well all of the applications crash in XP, so posting it here I am working as system engineer in a factory. one of the users is facing frequent applications crashes. The applications that crash include outlook 2003, excel 2003, mcafee scan (mcafee 8.7i patch 4 daily updated,), and sometimes even explorer.exe crashes. i dont know if pc is infected or not as whenever i try to run full scan of mcafee, it will crash after say 10-15 minutes. no bad sectors on C: drive. there are 4 KB bad sectors on F: drive which on second hard disk. i ran combofix, it scanned said rootkit activity found and rstarted and then continued scanning, but applications still keep crashing. i have used malwarebytes, it too crashes after 20-30 minutes. i am frustrated as i could not resolve this issue in last 20 days. any ideas..?