Last week my brother asked for my help because "his laptop wouldn't start" showing a BSOD when you tried to boot. He hasn't used an AV for more than a year despite mi several warnings. Obviously I performed a MBAM scan and it found 47 infections, most of the "harmless" trojans, but there's a nasty Vundo variant that won't go away. It's there after every reboot. I performed 4 MBAM scans, both on normal and safe mode. 2 SAS scans (normal and safe). 1 Avira scan. 1 Kaspersky AVP Tool scan. Still there. I used HijackThis and AVG anti-rootkit. I thought I had beaten this nasty, but MBAM says it's still there. I waited a few days for new definitions, but still no luck. Last time I tried was 4 days ago. I scanned with MBAM, selected "Remove all selected" and rebooted. After that I scanned again, so I could save 2 logs, so you could maybe see what's going on. Logs are in spanish, but I think they are very straightforward to understand. Here is the MBAM log for the 1st scan: