Click start, all programmes, accessories, system tools to run disc clean up, then from system tools, run disc defragmenter.
Click 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
If no change
Please go here to repair your operating systemhttp://www.geekstogo...ws-XP-t138.html
Use 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 UpdatesThe next part is optional
Get the trial of Tune Up 2006 hereTune Up 2006 Trial
Run disc clean up then registry clean up, then click optimize to run reg defrag, which needs a reboot
While you have the trial you can run the optimizer for internet, configuration and system