I believe Prefetch was created for Win XP and Superfetch was an improvement for Vista. In my Win 7 registry I have Prefetcher and Superfetch. Notice the different spellings for each? One is followed by “er” but not the other. Is Prefetcher the same or different than Prefetch? If they are different does Prefetcher do a better job in Win 7 that Prefetch did in Vista?