Restore your page file, clean out temp/cache/MRUs with CCleaner and also clean the registry with it, remove all files from C:\WINDOWS\Prefetch, turn off unncessary Services and disable unneeded Start-up entries. Set the page file to 1.5x the size of how much RAM you have and make sure the initial and max value are the same. If you have more than one harddrive or partition, place the page file on that second one. Disable all visual effects, except for "Show Windows Contents While Dragging", then defrag with PerfectDisk v7.0. If you're wondering about Services, I have put together 2 reg files, one for networked PCs and one for non-networked PCs. You might have to change a thing or two, so take 5 minutes to go through the reg file in Notepad and change the "4" value to "2" (Automatic) or "3" (Manual).