Marktreg and Fleamour, I seem to be experiencing the same issue. I have uninstalled and reinstalled Malwarebytes per your directions and it did solve a couple of issues I was having. I've also added Malwarebyte files to the AV ignore list. However, the Normal and Quick scans are still running extremely slow. At the 1 minute point no more than 900 files scanned and more often 6-700 scanned before I stop it. I ran a Flash scan and it scanned to completion in about 7 minutes, and performed as the Normal and Quick scans used to perform. I found this very interesting and thought it worth mentioning to add to you information in diagnosing the slow running issue. FWIW I'm running a Win 7, 64 bit sys.