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I got a BSOD ( . . . win32k.sys . . . begin physical memory dump . . . ) and looked to see what unsigned drivers I had. I think mbamchameleon.sys in this folder is related to Malwarebytes: C: \ Windows \ system32 \ drivers When I installed SplitCam, Win XP said that it could make the system unstable, but I installed it anyway, so I think that my BSOD was most likely due to splitcamaudio.sys But at this time, looking for any unsigned drivers, I also found mbamchameleon.sys in there . . . so I have removed it to a non-loadup folder (I think that's how this works) C: \ Windows \ system32 unsigned drivers I think the four unsigned lv's are for my Logitech camera, but I'm not sure, no concrete answers from googling, but I removed those also I just wanted to check here to verify that mbamchameleon.sys is Malwarebytes . . . I just ran Malwarebytes, and got no error message with mbamchameleon.sys moved. ************************************************************************************************************************************************************************************ To Verify Unsigned Device Drivers Start \ Run \ sigverif \ OK Advanced \ [dot] Look for other files that are not digitally signed \ Look in this folder: Windows \ system32 \ drivers Logging tab \ [check] Save the file signature verification results to a log file \ OK \ Start Advanced \ Logging tab \ View log You can move them from "system 32 \ drivers" to another folder you create (for backup purposes), ie: C: \ Windows \ system32 unsigned drivers Then Restart . . . Take a look in the Device Manager and look for yellow exclamation points ... View \ Show hidden devices Option 1: XP might auto-install a driver for you Option 2: Look for updated drivers on your computer manufacturer's web site ************************************************************************************************************************************************************************************ File Modified Version Status Catalog Signed By ------------------ ------------ ----------- ------------ ----------- ------------------- [c:\windows\system32\drivers] lvfal100.cfg 8/12/2011 None Not Signed N/A lvfel100.cfg 8/12/2011 None Not Signed N/A lvfel101.cfg 8/12/2011 None Not Signed N/A lvfel102.cfg 8/12/2011 None Not Signed N/A mbamchameleon.sys 1/17/2012 None Not Signed N/A splitcamaudio.sys 8/25/2011 6.1.7600.16385 Not Signed N/A