Recently I have found an odd memory problem in Windows XP. Several day's ago whenever I checked the usage in task manager it would show as around 190mb, increasing when opening programs and shrinking back when they were closed. I was going through some XP tweak sites to try and improve the preformance and ended up changing several registry keys. Most of the key's I can remember but there are a few which I cannot. Somewhere within these changes I believe is my problem as Windows now shows a usage of between 550mb and 700mb just at startup. It is almost as if every program and device windows uses was loaded into memory something like old DOS used to do if the high memory wasn't eneabled. Each program now seems to use more than 10 times the amount of memory they used to and I have searched over everything I can think of. Would anyone have some suggestions for this problem or know of links to or anyone who has experienced this before. Any help would be greatly appeciated.