System: Windows 7 Service Pack 1
Real-time AV: Avast free and MSE
7 weeks ago, Avast started warning me about some blocked threats, and it keeps dinging ever since "threat has been detected".
This usually happens when I start Windows or spontaneously. (Sometimes while I'm away from my computer with no browsers or programs open!)
I scanned my device with Avast, MSE, MBAM and Emsisoft emergency kit, all scans were clean.
Am I infected? Is it a "Microsoft certificate revocation list" problem?