I was able to track down version 1.32 and test it out with DebugView. This led me to figure out the problem: a giant WebsiteCache folder in Application Data that contained ~6000 directories. I was able to clear out this cache, and the full scan ran fine. It appears that MBAM was performing an EnumerateFolderContents on each of these directories and never coming up with items to scan. Unfortunately, this gives the appearance of a "freezing" program, since the view only seems to update when a scannable file is found. Perhaps directories should be shown during scanning as well to fix this behavior. My advice to anyone else having this problem is to mark which file was last scanned when it "froze" and search around that area for a folder structure like the one I described. I hope these results are helpful. -Dan