Q: Windows XP Pro won't boot, safe mode boot hangs at agp440.sys

I can't boot either Normal or Safe from disk. It hangs after agp440.sys.  I've tried to leave it to do whatever it might be doing in the background but it just doesn't complete.  I have a Sony recovery CD but I can't boot from it unless I want to format the disk and re-install Windows. I don't want to do that since it takes the best part of two days to install it plus everything else and apply all updates.

What I have done is install Windows Home on a separate disk and that's working fine. I have also recovered my backups - Yes, I have backups - but I don't have incremental backups so there are still items I need to recover.  I can do this easily since I have access to the Windows XP Pro boot disk from a USB caddy and all my data is still there intact.  I just can't boot from this disk and consequently I can't get access to all the other free software that came with the Sony VAIO.

I'm looking for a resolution to the boot problem - hanging after AGP440.sys (is there something I can repair on this disk to make it boot) - and/or how to extract Windows XP Pro and/or the free software from the Sony OEM disk.   Adivice gratefully appreciated.  Thanks.



You copycat!

There is also a KB about agp440.sys here.

Are you buckin' fer one of them "expert" badges?

Did this solve your problem?

Sorry this didn't help.

8 people were helped by this reply



If you see hard drive activity while the PC APPEARS to be stuck on agp440.sys, this is a GOOD thing since it means Windows XP is conducting chkdsk in the background. Let it finish, even if it takes all night. Just check it in the morning.

If that is not the issue, you will need to create your own bootable Windows XP Recovery Console CD, configure your PC's BIOS to boot from it, then actually boot from it, and then run the chkdsk command with the /r switch. Complete instructions may be found in ElderL's post from this thread:

For simplicity, here they are:

Power failures are notorious for corrupting your NT File System (NTFS), so you need to boot into the XP Recovery Console and run chkdsk  /r  until it reports no errors (that may take more than one pass).  You are on the right track though.

If after burning your CD as indicated below, you do NOT see the message:

Press any key to boot from CD...

Then you need to get into the BIOS in your system of unspecified make and model and adjust the device boot order to put the CD Drive as the first boot device.

If you see the same missing or corrupt message instead something is not right and you need to look at things more closely.  Sometimes there is an option on the screen when the system reboots to press a key to select a boot device (mine is F11) and then you can just choose the CD/DVD drive as the boot device.

If anybody wants to recreate these sorts of problems for practice, just pull the plug on your running XP system 4 or 5 times and you will all the message we know and love.

Here are my standard suggestions:

You can make a bootable Recovery Console CD by downloading an ISO file and burning it to a CD.

The bootable ISO image file you need to download is called:


Download the ISO file from here:

Use a new CD and this free and easy program to burn your ISO file and create your bootable CD:

When installing ImgBurn, DO NOT install the Ask toolbar.

Here are some instructions for ImgBurn:

It would be a good idea to test your bootable CD on a computer that is working.

You may need to adjust the computer BIOS settings to use the CD ROM drive as the first boot device instead of the hard disk.  These adjustments are made before Windows tries to load.  If you miss it, you will have to reboot the system again.

When you boot on the CD, follow the prompts:

Press any key to boot from CD...

The Windows Setup... will proceed.

Press 'R' to enter the Recovery Console.

Select the installation you want to access (usually  1: C:\WINDOWS)

You may be asked to enter the Administrator password (usually empty).

You should be in the C:\WINDOWS folder.  This is the same as the 

C:\WINDOWS folder you see in explorer.

The Recovery Console allows basic file commands like: copy, rename, replace, delete, cd, chkdsk, fixboot, fixmbr, etc.

For a list of Recovery Console commands, enter help at the prompt or read about the XP Recovery Console here:

A good idea before starting things is to first verify the integrity of your file system using the chkdsk command.

From the command prompt window run the chkdsk command on the drive where Windows is installed to try to repair any problems on the afflicted drive.

Running chkdsk is fine even if it doesn't find any problems.  It will not hurt anything to run it.

Assuming your boot drive is C, run the following command:

chkdsk C: /r

Let chkdsk finish and correct any problems it might find.  

It may take a long time for chkdsk to complete or it may appear to be 'stuck'.  Be patient.  If the HDD light is still flashing, chkdsk is doing something.  Keep an eye on the percentage amount to be sure it is still making progress.  It may even appear to go backwards sometimes.

You should run chkdsk /r again until it finds no errors to correct.

Remove the CD and type 'exit' to leave the RC and restart the computer.

You do not have to adjust the BIOS again to boot on the HDD since the CD will not be present.

Did this solve your problem?

Sorry this didn't help.

3 people were helped by this reply

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Views: 11550 Last updated: December 12, 2017 Applies to: