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How to determine which version of Internet Explorer is installed

Article ID:164539
Last Review:October 27, 2004
Revision:12.0
This article was previously published under Q164539

SUMMARY

This article describes how to determine which version of Internet Explorer you are using.

Note Internet Explorer for Windows 3.1, Internet Explorer for UNIX on Sun Solaris, and Internet Explorer for UNIX on HP-UX are no longer available from Microsoft. For information about how to obtain the latest version of Internet Explorer for Macintosh, visit the following Microsoft Web site: For Internet Explorer for 32-bit versions of Windows, obtain the latest service pack for Internet Explorer 5.01 or Internet Explorer 6. For additional information about how to obtain the latest service pack for Internet Explorer 5.01, click the following article number to view the article in the Microsoft Knowledge Base:
267954 How to Obtain the Latest Internet Explorer 5.01 Service Pack
For additional information about how to obtain the latest service pack for Internet Explorer 6, click the following article number to view the article in the Microsoft Knowledge Base:
328548 How to Obtain the Latest Service Pack for Internet Explorer 6
For information about Internet Explorer product availability and support, visit the following Microsoft Web site:For a list of Microsoft Product Support Services phone numbers and information about support costs for Internet Explorer, visit the following Microsoft Web site:

MORE INFORMATION

Internet Explorer for 32-Bit Windows

Internet Explorer version numbers for Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition (Me), Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003 use the following format:
major version.minor version.build number.sub-build number
This table includes possible Internet Explorer version numbers.
   Version          Product
   -----------------------------------------------------------------
   4.40.308         Internet Explorer 1.0 (Plus! for Windows 95)
   4.40.520         Internet Explorer 2.0
   4.70.1155        Internet Explorer 3.0
   4.70.1158        Internet Explorer 3.0 (Windows 95 OSR2)
   4.70.1215        Internet Explorer 3.01
   4.70.1300        Internet Explorer 3.02 and 3.02a
   4.71.544         Internet Explorer 4.0 Platform Preview 1.0 (PP1)
   4.71.1008.3      Internet Explorer 4.0 Platform Preview 2.0 (PP2)
   4.71.1712.6      Internet Explorer 4.0
   4.72.2106.8      Internet Explorer 4.01
   4.72.3110.8      Internet Explorer 4.01 Service Pack 1 (Windows 98)
   4.72.3612.1713   Internet Explorer 4.01 Service Pack 2
   5.00.0518.10     Internet Explorer 5 Developer Preview (Beta 1)
   5.00.0910.1309   Internet Explorer 5 Beta (Beta 2)
   5.00.2014.0216   Internet Explorer 5
   5.00.2314.1003   Internet Explorer 5 (Office 2000)
   5.00.2614.3500   Internet Explorer 5 (Windows 98 Second Edition)
   5.00.2516.1900   Internet Explorer 5.01 (Windows 2000 Beta 3, build 5.00.2031)
   5.00.2919.800    Internet Explorer 5.01 (Windows 2000 RC1, build 5.00.2072)
   5.00.2919.3800   Internet Explorer 5.01 (Windows 2000 RC2, build 5.00.2128)
   5.00.2919.6307   Internet Explorer 5.01 (Office 2000 SR-1)
   5.00.2920.0000   Internet Explorer 5.01 (Windows 2000, build 5.00.2195)
   5.00.3103.1000   Internet Explorer 5.01 SP1 (Windows 2000 SP1)
   5.00.3105.0106   Internet Explorer 5.01 SP1 (Windows 95/98 and Windows NT 4.0)
   5.00.3314.2101   Internet Explorer 5.01 SP2 (Windows 95/98 and Windows NT 4.0)
   5.00.3315.1000   Internet Explorer 5.01 SP2 (Windows 2000 SP2)
   5.00.3502.1000   Internet Explorer 5.01 SP3 (Windows 2000 SP3 only)
   5.00.3700.1000   Internet Explorer 5.01 SP4 (Windows 2000 SP4 only)
   5.50.3825.1300   Internet Explorer 5.5 Developer Preview (Beta)
   5.50.4030.2400   Internet Explorer 5.5 & Internet Tools Beta
   5.50.4134.0100   Internet Explorer 5.5 for Windows Me (4.90.3000)
   5.50.4134.0600   Internet Explorer 5.5
   5.50.4308.2900   Internet Explorer 5.5 Advanced Security Privacy Beta
   5.50.4522.1800   Internet Explorer 5.5 Service Pack 1
   5.50.4807.2300   Internet Explorer 5.5 Service Pack 2
   6.00.2462.0000   Internet Explorer 6 Public Preview (Beta)
   6.00.2479.0006   Internet Explorer 6 Public Preview (Beta) Refresh
   6.00.2600.0000   Internet Explorer 6 (Windows XP)
   6.00.2800.1106   Internet Explorer 6 Service Pack 1 (Windows XP SP1)
   6.00.2900.2180   Internet Explorer 6 for Windows XP SP2
   6.00.3663.0000   Internet Explorer 6 for Microsoft Windows Server 2003 RC1
   6.00.3718.0000   Internet Explorer 6 for Windows Server 2003 RC2
   6.00.3790.0000   Internet Explorer 6 for Windows Server 2003 (released)

Notes

The About Internet Explorer dialog box displays only one zero for the minor version number if the minor version number is 00 (for example: 6.00.2800.1106 is displayed as 6.0.2800.1106).
All versions of Internet Explorer 5.0 and later that are customized with Microsoft Internet Explorer Administration Kit (IEAK) include one of the following strings after the version number when you click About on the Help menu:
IC = Internet Content Provider
IS = Internet Service Provider
CO = Corporate Administrator
Internet Explorer versions 4.0 and later include an Update Versions line that lists all installed updates or hotfixes to the current version of Internet Explorer. Updates to Internet Explorer 4.01 Service Pack 2 or Internet Explorer 5.0 and later are listed by their corresponding Microsoft Knowledge Base article "Q" number (for example, Q164539 refers to this article).
To determine the version of Internet Explorer that is currently installed on your computer, use any of the following methods:
Determine the version of Internet Explorer by using the user interface

In all versions of Internet Explorer, click About Internet Explorer on the Help menu. The product and version information is displayed in the dialog box that appears.
Determine the version of Internet Explorer by using the registry:

You can determine the version of Internet Explorer that you are running by viewing the following registry key:
HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer
If a "Version" value appears in this key, Internet Explorer 4.0 or later is installed. The "Version" string value contains the version of Internet Explorer 4.0 or later that is installed on your computer (for example, the Version string value for Internet Explorer 5 is "5.0.2014.0216"). Note that only one zero is stored in the registry for the minor version number if the minor version number is 00. If the minor version is not 00, the full version value is stored (for example, 5.50.4807.2300 is stored in the registry as 5.50.4807.2300).

Internet Explorer 3.x does not add the "Version" value to the registry. Instead, it adds a "Build" value to the same registry key and updates the "IVer" string value to "103." For backwards compatibility, Internet Explorer 4.0 and later modifies or adds the "Build" value. For Internet Explorer 3.x, the "Build" value is a string that contains the four-character build number (for example, "1300" for Internet Explorer 3.02). For Internet Explorer 4.0 and later, the "Build" value is a string that contains a five-character value, followed by a period and four more characters, in the following format:
major versionbuild number.sub-build number
For example, the "Build" value for Internet Explorer 5 is "52014.0216."

Internet Explorer 1.0 for Windows 95 (included with Microsoft Plus! for Windows 95) does not add the "Version" or "Build" values to the registry. Instead, it adds an "IVer" value to the same registry key and sets the string value to "100." Internet Explorer 2.0 for Windows 95 adds the "Build" value (which it sets to "520"), and updates the "IVer" string value to "102." Versions of Internet Explorer that are included with Windows NT 4.0 do not add the "Build" value to the registry, but they do update the "IVer" string value to "101."

If none of these values is in the registry, Internet Explorer is not installed properly or at all.
Determine the version of Internet Explorer by using the Shdocvw.dll file:

For Internet Explorer 3.0 and later, the browser is implemented in the Shdocvw.dll (Shell Document Object and Control Library) file. You can use the version of the Shdocvw.dll file to determine the version of Internet Explorer that is installed on your computer. To do so, follow these steps:
1.Click Start, point to Find, and then click Files Or Folders.
2.In the Named box, type shdocvw.dll, and then click Find Now.
3.In the list of files, right-click the Shdocvw.dll file, and then click Properties.
4.Click the Version tab.
This table lists the different versions of the Shdocvw.dll file and the corresponding versions of Internet Explorer.
      Version         Product
      --------------------------------------------------------------
      4.70.1155       Internet Explorer 3.0
      4.70.1158       Internet Explorer 3.0 (Windows 95 OSR2)
      4.70.1215       Internet Explorer 3.01
      4.70.1300       Internet Explorer 3.02 and 3.02a
      4.71.1008.3     Internet Explorer 4.0 Platform Preview 2.0 (PP2)
      4.71.1712.5     Internet Explorer 4.0
      4.72.2106.7     Internet Explorer 4.01
      4.72.3110.3     Internet Explorer 4.01 Service Pack 1 (Windows 98)
      4.72.3612.1707  Internet Explorer 4.01 Service Pack 2
      5.00.0518.5     Internet Explorer 5 Developer Preview (Beta 1)
      5.00.0910.1308  Internet Explorer 5 Beta (Beta 2)
      5.00.2014.213   Internet Explorer 5
      5.00.2314.1000  Internet Explorer 5 (Office 2000)
      5.00.2516.1900  Internet Explorer 5.01 (Windows 2000 Beta 3, build 5.00.2031)
      5.00.2614.3500  Internet Explorer 5 (Windows 98 Second Edition)
      5.00.2919.800   Internet Explorer 5.01 (Windows 2000 RC1, build 5.00.2072)
      5.00.2919.3800  Internet Explorer 5.01 (Windows 2000 RC2, build 5.00.2128)
      5.00.2919.6307  Internet Explorer 5.01 (Office 2000 SR-1)
      5.00.2920.0000  Internet Explorer 5.01 (Windows 2000, build 5.00.2195)
      5.00.3103.1000  Internet Explorer 5.01 SP1 (Windows 2000 SP1)
      5.00.3105.0106  Internet Explorer 5.01 SP1 (Windows 95/98 and Windows NT 4.0)
      5.00.3314.2100  Internet Explorer 5.01 SP2 (Windows 95/98 and Windows NT 4.0)
      5.00.3315.2879  Internet Explorer 5.01 SP2 (Windows 2000 SP2)
      5.00.3502.5400  Internet Explorer 5.01 SP3 (Windows 2000 SP3 only)
      5.00.3700.6668  Internet Explorer 5.01 SP4 (Windows 2000 SP4 only)
      5.50.3825.1300  Internet Explorer 5.5 Developer Preview (Beta)
      5.50.4030.2400  Internet Explorer 5.5 & Internet Tools Beta
      5.50.4134.0100  Internet Explorer 5.5 for Windows Me (4.90.3000)
      5.50.4134.0600  Internet Explorer 5.5
      5.50.4308.2900  Internet Explorer 5.5 Advanced Security Privacy Beta
      5.50.4522.1800  Internet Explorer 5.5 Service Pack 1
      5.50.4807.2300  Internet Explorer 5.5 Service Pack 2
      6.00.2462.0000  Internet Explorer 6 Public Preview (Beta)
      6.00.2479.0006  Internet Explorer 6 Public Preview (Beta) Refresh
      6.00.2600.0000  Internet Explorer 6 (Windows XP)
      6.00.2800.1106  Internet Explorer 6 Service Pack 1 (Windows XP SP1)
      6.00.2900.2180  Internet Explorer 6 for Windows XP SP2
      6.00.2800.1278  Internet Explorer 6 Update v.01 Developer Preview (SP1b Beta)
      6.0.2800.1314 Internet Explorer 6 Update v.04 Developer Preview (SP1b Beta)
      6.00.3663.0000  Internet Explorer 6 for Microsoft Windows Server 2003 RC1
      6.00.3718.0000  Internet Explorer 6 for Windows Server 2003 RC2
      6.00.3790.0000  Internet Explorer 6 for Windows Server 2003 (released)
Note Internet Explorer 6 Update v.01 and v.04 are pre-release versions of Internet Explorer 6 that change the behavior of Internet Explorer when loading ActiveX controls. These pre-release updates are installed in side-by-side mode and will not affect the installation or version number of Internet Explorer 6 SP1 (6.00.2800.1106). Internet Explorer 6 Update v.01 and v.04 require Windows XP Service Pack 1. For additional information about these pre-release updates, visit the following Microsoft Web site: http://msdn.microsoft.com/ieupdate/default.asp

Notes
The Windows 2000, Windows XP, and Windows Server 2003 File Properties dialog box displays only one zero for portions of the version number that are all zeros (for example: 5.00.2920.0000 is shown as 5.0.2920.0).
The Shdocvw.dll file is installed in the %Windir%\System folder in Windows 95, Windows 98, and Windows Millennium Edition. The Shdocvw.dll file is install in the %Windir%\System32 folder in Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003. If the Shdocvw.dll file does not exist, Internet Explorer is either not installed correctly or not installed at all.
If the version of the Shdocvw.dll file on your computer is not listed in this table, you have installed an Internet Explorer hotfix, patch, or security update that contains a later version of the Shdocvw.dll file. For example, Shdocvw.dll version 6.0.2800.1170 for Internet Explorer 6 SP1 is included with the MS03-015: April, 2003, Cumulative Patch for Internet Explorer (813489) package. If your version of Shdocvw.dll is not listed in this table, you are running the version of Internet Explorer with the closest version number that is lower than your version number. To determine which Internet Explorer hotfix, patch, or security update is installed, search for your Shdocvw.dll version number and "Shdocvw.dll" in the Microsoft Knowledge Base.
Determine the version of Internet Explorer by using a script:

All versions of Internet Explorer send version information in the Hypertext Transport Protocol (HTTP) user agent information header. This information can be read from script on a Web page. For information about how to use a script to obtain the version of Internet Explorer someone is using, please see the following article in the Microsoft Knowledge Base:
167820 HOWTO: Determining Browser Version from a Script
272413 HOWTO: Determine Browser Type in Server-Side Script Without the BrowserType Object
Web page developers can use this information to take advantage of new features in later versions of Internet Explorer (for example, Dynamic Hypertext Markup Language [HTML] or Channels in Internet Explorer 4.x), and degrade gracefully for earlier versions of Internet Explorer that do not support these features.

If you need to uniquely identify Internet Explorer version 5.0 or later versions (on Microsoft Win32 and UNIX platforms only), use the isComponentInstalled or getComponentVersion methods of the CLIENTCAPS behavior. For information about these methods, see the following Microsoft Web sites: Note These methods do not work if the client is not Internet Explorer 5 or later (Microsoft Win32 and UNIX platforms only).

Identify 128-Bit versions of Internet Explorer:

128-bit strong encryption is included in all versions of Internet Explorer 5.5 and later. If you are running Windows 2000, installing Internet Explorer 5.5 will not change the current level of encryption on your computer, and you will have to install the Windows 2000 High Encryption Pack. To determine if you are running the 128-bit strong encryption version of Internet Explorer 3.x or 4.x, check the properties of the Schannel.dll file. To do so, use the following steps.

Note If you are running Internet Explorer 4.01 or later, click About Internet Explorer on the Help menu to determine if the 128-bit or 40-bit version of the Schannel.dll file is installed.
1.Click Start, point to Find, and then click Files Or Folders.
2.In the Named box, type schannel.dll, and then click Find Now.
3.In the list of files, right-click the Schannel.dll file, and then click Properties.
4.Click the Version tab.
For the 40-bit or Server Gated Cryptography (SGC) version of the Schannel.dll file, "PCT/SSL Security Provider (Export Version)" is the description.

For the 128-bit version of the Schannel.dll file, "PCT/SSL Security Provider (US and Canada Use Only)" is the description.

Note that the version number of the Schannel.dll file is the same for 40-bit, SGC, and 128-bit versions; only the file description is different.

For additional information about the SGC version of the Schannel.dll file, please see the following article in the Microsoft Knowledge Base:
148427 Generic SSL (PCT/TLS) updates for IIS and Microsoft Internet products
For additional information about 128-bit strong encryption in Internet Explorer, visit the following Microsoft Web page:

Internet Explorer for Macintosh or Windows 3.1

In Internet Explorer, click About Internet Explorer on the Help menu. On the Macintosh, click About Internet Explorer on the Apple menu. The version number is displayed in the dialog box that appears. Possible version numbers include:
   Windows 3.1   Macintosh Classic*   Macintosh OS X
   -------------------------------------------------
   2.0           2.0                  5.1.1
   2.01          2.1                  5.1.2
   2.1           3.0                  5.1.3
   3.0           3.0a                 5.1.4
   3.0a          3.01a                5.2
   3.01          4.0                  5.2.1
   3.02a         4.5                  5.2.2
   4.0           4.5.1                5.2.3
   5             5.01
                 5.1
                 5.1.3
                 5.1.4
                 5.1.5
                 5.1.6
                 5.1.7 
Note If the version number is 3.0, you should also check the build number next to the version number. To determine if you are running the 128-bit strong encryption version of Internet Explorer for Macintosh, click About Internet Explorer on the Apple menu, and then click Support. The Encryption box should contain the current encryption level. Examples include:
40 Bit International/Export Version
128 Bit US Domestic (Not for Export)
Another way to determine if you are running the 128-bit strong encryption version is to use the Get Info command on one of the following files (depending on your processor family: PowerPC or 68xxx) and examine the version information:
System Folder:Extensions:MS Library Folder:MS Internet Library (PPC)
System Folder:Extensions:MS Library Folder:MS Internet Library (68K)

Internet Explorer for UNIX on Sun Solaris

To determine the version of Internet Explorer that is currently installed on your Solaris SPARC computer, use the following steps:
1.Start a Terminal window. Determine the path to the installed Internet Explorer files. ( The default path is /usr/local/microsoft/, used in the following steps as the example path).
2.At the prompt, type cd /usr/local/microsoft, and then press ENTER.
3.Type ls -d ie*, and then press ENTER. If you see "ie4" displayed, you are running Internet Explorer 4.0; if you see "ie" displayed, you are running Internet Explorer 5.0.
4.At the prompt, type cd ie*/sunos5, and then press ENTER.
5.Type ls -l libschannel.so, and then press ENTER.
6.Compare the file information to the following table to determine the version of Internet Explorer that is currently installed on your computer.
File            Version         Size     Product
------------------------------------------------------------------------
libschannel.so  4.71.2011.4     257,668  Internet Explorer 4.01 40-bit
libschannel.so  4.71.2011.4     257,744  Internet Explorer 4.01 128-bit
libschannel.so  5.00.2013.1312  524,692  Internet Explorer 5.0 40-bit
libschannel.so  5.00.2013.1312  523,180  Internet Explorer 5.0 128-bit
libschannel.so  5.00.2013.2002  523,672  Internet Explorer 5.0 SP1 Beta 128-bit

Internet Explorer for UNIX on HP-UX

To determine the version of Internet Explorer that is currently installed on your HP-UX computer, use the following steps:
1.Start a Terminal window. Determine the path to the installed Internet Explorer files. (The default path is /usr/local/microsoft/, used in the following steps as the example path).
2.At the prompt, type cd /usr/local/microsoft, and then press ENTER.
3.Type ls -d ie*, and then press ENTER. If you see "ie4" displayed, you are running Internet Explorer 4.0; if you see "ie" displayed, you are running Internet Explorer 5.0.
4.At the prompt, type cd ie*/ux10, and then press ENTER.
5.If you have Internet Explorer 4.0, type ls -l libschannel.sl, and then press ENTER. If you have Internet Explorer 5.0, type ls -l libcrypt32.sl, and then press ENTER.
6.Compare the file information to the following table to determine the version of Internet Explorer that is currently installed on your computer.
File            Version         Size       Product
-------------------------------------------------------------------------
libschannel.sl  4.71.2004.9     181,023    Internet Explorer 4.01 40-bit
libschannel.sl  4.71.2004.9     181,025    Internet Explorer 4.01 128-bit
libcrypt32.sl   5.00.2013.1312  1,064,393  Internet Explorer 5.0 40-bit
libcrypt32.sl   5.00.2013.1312  1,072,589  Internet Explorer 5.0 128-bit

APPLIES TO
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 6.0 Service Pack 1
Microsoft Internet Explorer 5.5 Service Pack 1
Microsoft Internet Explorer 5.5 Service Pack 1
Microsoft Internet Explorer 5.5 Service Pack 1
Microsoft Internet Explorer 5.5 Service Pack 1
Microsoft Internet Explorer 5.5 Service Pack 1
Microsoft Internet Explorer 5.01 Service Pack 3
Microsoft Internet Explorer 5.01 Service Pack 3
Microsoft Internet Explorer 5.01 Service Pack 3
Microsoft Internet Explorer 5.01 Service Pack 3
Microsoft Internet Explorer 5.01 Service Pack 3
Microsoft Internet Explorer 5.0
Microsoft Internet Explorer 5.0
Microsoft Internet Explorer 5.0
Microsoft Internet Explorer 5.0
Microsoft Internet Explorer 5.0
Microsoft Internet Explorer 4.01 128-Bit Edition
Microsoft Internet Explorer 4.01 Service Pack 1
Microsoft Internet Explorer 4.01 Service Pack 2
Microsoft Internet Explorer 4.01 128-Bit Edition
Microsoft Internet Explorer 4.0 128-Bit Edition
Microsoft Internet Explorer 4.0 128-Bit Edition
Microsoft Internet Explorer 4.0 128-Bit Edition
Microsoft Internet Explorer 3.02
Microsoft Internet Explorer 3.02
Microsoft Internet Explorer 3.02
Microsoft Internet Explorer 3.01
Microsoft Internet Explorer 3.01
Microsoft Internet Explorer 3.01
Microsoft Internet Explorer 3.0
Microsoft Internet Explorer 3.0
Microsoft Internet Explorer 3.0
Microsoft Internet Explorer 2.01
Microsoft Internet Explorer 2.1
Microsoft Internet Explorer 2.01
Microsoft Internet Explorer 2.0
Microsoft Internet Explorer 2.0
Microsoft Internet Explorer 1.0
Microsoft Internet Explorer 5.0 for UNIX on HPUX
Microsoft Internet Explorer 5.0 for UNIX on Sun Solaris
Microsoft Internet Explorer 4.01 for UNIX on HPUX
Microsoft Internet Explorer 4.0 for UNIX
Microsoft Internet Explorer 4.5 for Macintosh
Microsoft Internet Explorer 4.0 for Macintosh
Microsoft Internet Explorer 3.0 for Macintosh
Microsoft Internet Explorer 3.0 for Macintosh
Microsoft Internet Explorer 2.1 for Macintosh
Microsoft Internet Explorer 2.0 for Macintosh
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