I've windows XP on a Dell. Recently I discovered a very annoying problem. my computer slows down when I try to open folders or scroll for files. I checked the Task manager and found that MsMpEng.exe is using as much as 75% CPU while I try to open folders. I understand that MSMpEng is an anti-malware program. Is there a way to fix this problem? Can this program be disable? If so how?