DEP error messages occur when Windows feels threatened by some application, so it is obviously not a good thing. XP knows what it needs to protect, so XP is doing it's job of trying to protect your system. You should figure out what the deal is and fix it.
The DEP error and the whole timer countdown thing sounds like your system has been compromised, and MBAM is trying to help.
I do not see the logic in ever letting MBAM do a quick scan unless you are in some kind of big hurry - why skip files? Just do the full scan and get it over with and not wonder later if the quick scan might have missing something. I know it sometimes wants to do a quick scan after a full, but always run a full again yourself. I would include a reboot in the process.
I like MBAM and SAS in that order and will always try to run them both once in a while and alternate since no one program can know about everything.
Download, install, update and do a full scan with these free malware detection programs:
Malwarebytes (MBAM): http://malwarebytes.org/
SUPERAntiSpyware: (SAS): http://www.superantispyware.com/
They can be uninstalled later if desired.
If the scans are clean and you still have issues, then they can be addressed.
If MBAM will not run clean with a full scan, you need to post in the Am I Infected forum.
If you run CCleaner, I would stay away from the Registry tool.
Edited by joseibarra, 10 November 2009 - 11:37 AM.