which is the best free windows optimizer ?

Answer 1

Download RegScrubXP--http://www.majorgeeks.com/download.php?det=2048

Safely cleans junk out of the Windows 2000/XP system registry. All changes made to the registry are fully restorable to it's original condition. You can make an exclusion list of registry entries that RegScrubXP will not display as problems. You can sift through a list of file extensions, company names, run upon startup programs, Internet Explorer history, and uninstall programs to delete what you think is junk.