@Alibaba:
Yes I use Kaspersky
Defragment also worked, but after 2 days it gets back, looks like I'll remove my Kaspersky (I got it as a gift, so it shouldn't be a problem with deleting it. I was happy with my Microsoft Security Eessentials
)
@Dean:
Actually, it gives me some false alarms also. I know it has a good popularity, but for me it just ain't right.
I even have no idea why did I installed it.