Hi! On Ocotober 17th (two days ago) I updated the malwarebytes as always do every few times a day, and ran a quick scan and all went well, no problems. About a half hour later I decided to run a full scan and so checked for updates again and ran the full scan. About 8 or so minutes into the scan I received the blue screen of death saying Malwarebytes at the top of the bsod message and a stop code 0x00000050 - page fault in non paged area. It also said malwarebytes below that bit as well on the blue screen as of course was running this when got the message. As the system was froze I shut off the power and turned back on and started in safe mode. I then ran malwarebytes full scan in safe mode and it ran all the way through and there were no problems. I posted in microsoft thinking was a microsoft problem but they felt it was the malwarebytes which caused the problem since that is where the blue screen occurred while running that program, and perhaps the update caused the problem they said. I looked thru the forum here and see no similar problem like this, but wondering if anyone has suggestions on if is possible there was a bad update with malwarebytes which would cause the bsod? I am afraid to run another full scan in regular mode in case it crashes windows again. At this point I have database version 2971 and fingerprints loaded 145065 and the version of malwarebytes I have is 1.41. I use vista 32 bit, sp 1. To summarize, the full scan causing the bsod was run two days ago, so I do not have what version/fingerprints for that time, and I was able to run the full scan in safe mode. Do you think I should uninstall malwarebytes and reinstall? Does malwarebytes often cause bsod? I've not tried running a full scan since the one in safe mode as afraid sys will crash again. Actually, I've not run a quick scan either since this occurred two days ago. If it s recommended here to reinstall can someone let me know if I first need to uninstall and/or use any special uninstallers before reinstalling? Thanks for your help.