well i was useing kaspersky anti-virus till i got an upadte for there lastest one and it screwed up on installing things and it wouldent work proper now i am useing nod32 and i dont have any problems with it. Iam thining of going back to useing kaspersky anti-virus when they finish there new virsion til lthen am sticking with nod 32 as i do not get any problems with it and its verry fast and hardy uses any ram