Had the same problem! Go to the quarantine list, and manually uncheck all the quarantined files. DO NOT DELETE THE QUARANTINED FILES To uncheck the quarantined files, use the down cursor and the spacebar to save some time and mouse-click pain. I had 808 files to unclick. Then click "Ignore" An issue like this is nearly unforgiveable, especially to those of us with Corporate versions that have updates and scans automatically configured to run routinely throughout the day. Interestingly, I only had a problem on one Win7 Ultimate laptop. build is: 1.65.1.100 db v2013.04.15.13 Scan is running now The Win8 Pro laptop hasn't been affected - yet but shows Its build is: 1.70.0.1100 db v2013.04.15.07 This issue MAY have been fixed with MBAM's update v2013.04.15.13 at this point, it's done about half of a full scan without detecting any "trojan"....