http://support.microsoft.com/kb/315265/ - How to perform disk error checking in Windows XP

You can do a disk check with the chkdsk.exe program. If you run the chkdsk.exe program from a cmd.exe Command window then you can read the response from the chkdsk.exe program. Open a cmd.exe window:<br /> Start &gt; Run: cmd.exe &lt;press Enter&gt; At the command prompt (>) type or Copy&Paste: chkdsk.exe /f /r &lt;press Enter&gt; (put a space before /f and /r) If you get something like: Would you like to schedule this volume to be checked the next time the system restarts? y/n then answer the question with "Y" and close all programs and reboot the computer. http://support.microsoft.com/kb/315265/ - How to perform disk error checking in Windows XP ---- Do a malware check with a few malware scan programs.<br /> You need to use all programs because each detects different malware.<br /> Make sure that you update each program to get the latest version of the database before doing a scan. * http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware * http://www.superantispyware.com/ - SuperAntispyware * http://www.safer-networking.org/en/index.html - Spybot Search & Destroy * http://www.lavasoft.com/products/ad_aware_free.php - Ad-Aware Free * http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page See also "Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked and [[Searches are redirected to another site]] If you can't fix it with the above listed scanners then you need to ask advise on one of the forums that specialize in malware removal mentioned in the <i>Popups_not_blocked</i> article.