If you can tie this down to recently
How to Start the System Restore tool at a command prompt
1. Restart your computer, and then press F8 during the initial startup to start your computer in Safe Mode with a command prompt.
2. Log on to your computer with an administrator account or with an account that has administrator credentials.
3. Type the following command at a command prompt, and then press ENTER:
%systemroot%\system32\restore\rstrui.exe
4. Follow the instructions that appear on the screen to restore your computer to an earlier state.
For additional information about the Safe mode with a command prompt, click the following article number to view the article in the Microsoft Knowledge Base:
A description of the Safe mode boot options in Windows XP
http://support.micro....com/kb/315222/If you cannot tie this down to recently
Please go here to repair your operating systemRepair XPIf you are unable to run Repair XPAlternate XP Repair GuideUse the last one - Windows Installation CD to repair the current installation, which uses a slightly different methodWindows XP repair feature won't delete your data, installed programs, personal information, or settings. It just repairs the operating systemAfter running the repair it will be necessary to install all Windows UpdatesWhen it is repaired and and before you update, you can run these to check everything is as it should be
Click start, all programmes, accessories, system tools to run disc clean up, then from system tools, run disc defragmenter.Click start then run, type prefetch then press enter, click edit then select all, right click any file, click delete, confirm delete then rebootClick start then run, type sfc /scannow then press enter, you need the XP CD and get a blue progress bar, after the bar goes, reboot.Click start then run, type chkdsk /f /r then press enter, type Y to confirm for next boot, press enter then reboot.This will take an hour, it will appear to load normally then either the monitor will show progress or the screen will go blank, do not disturb this. When it gets to the desktop, the system files and the hard drive will be as they should
Run the updates thenPlease go here: Malware Removal GuideRun
all the programmes as advised then post a
current Hijack This Log in a new topic in the Malware Forum
If you are unable to run any of the programmes, ask for advice in the Malware Forum