As suggested by “grasshopper”, if reinstallation of the graphic driver took care of the issue, then the problem could be with the Windows update. But if the issue still persists then you can even try doing System Restore to a date when your system was working fine.
To use System Restore to restore Windows XP to a previous state, follow these steps:
1. Log on to Windows as an administrator.
2. Click “Start”, click “All Programs”, click “Accessories”, click “System Tools”, and then click “System Restore”.
3. On the “Welcome to System Restore” page, click to select “Restore my computer to an earlier time” option and then click “Next”.
4. On “Select a Restore Point” page, click the most recent system restore point in the “On this list, click a restore point” list, and then click “Next”. A System Restore message may appear that lists configuration changes that System Restore will make. Click “OK”.
5. On “Confirm Restore Point Selection” page, click “next”. System Restore restores the previous Windows XP configuration, and then restarts the computer.
6. Log on to the computer as an Administrator. Then click “OK” on the System Restore “Restoration Complete” page.
If you successfully restored your computer to a previous state, and the computer performs as expected, then issue will be resolved.
Kindly get back if there are any further queries.
Thanks & Regards