Have you emptied your temp folder lately? It might be time to do some maintenance. Here's a little checklist:
-- Delete all temp files (c:\windows\temp\*.tmp, or on XP C:\Documents and Settings\username\Local Settings\Temp)
-- Delete temporary internet files (c:\windows\temporary internet files\*.*, or on XP C:\Documents and Settings\username\Local Settings\Temporary Internet Files)
-- If you use I.E., click on Tools, Internet Options, Delete Files, select "delete all off-line content", click OK
-- Click on Start, Programs, Accessories, Systems Tools, Disk Cleanup
-- Download AdAware (
), check for updates, run it and remove whatever it finds
-- Download Diskeeper (
) defrag
-- Download, update and turn on SpywareBlaster (
and SpywareGuard (
) (or your spyware program of choice).