I have been experiencing memory leak problems on two computers (with cloned Windows XP pro system.) The usual symptoms are 'event 2020' "The server was unable to allocate from the system paged pool because the pool was empty.", unable to run programs and weird windows behavior.  This happened over a period of 1 day to 1 week and needs reboot.  I searched online and followed some trouble shooting guide.  Here is what I found so far.  The handles count for explorer.exe went up to 18,000 which I think is high.  Under Process Explorer I found many handles with no name.  The type is event and access is 0x001F0003.  Using pause and refresh I did find creations of this type of handles.  But the problem is I can't find which program is causing this.  I suspect the culprit is some kind of shell extension of explorer.   Any help is appreciated. Some addiional info:  I tried upgrading Nvidia driver,  uninstalling windows desktop search, but didn't work.  Programs that I usually run:  MS Office, IE, firefox, Acrobat, SAS,  Kaspersky antivirus 7, itunes, skype, windows live messenger, babylon, Geeksquad power management software, ultraedit, .

Never easy. Start with a diag suite. Do a clean install of XP. Run performance monitor log for baseline. Add in apps until the perfmon shows leaks. "Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10