I use MBAM for a longtime.Recently,I updated vn. 1.38 to 1.40.(I have WinXP pro-sp2 and AvastAVPro without any problems).I did a quick scan as usual enabling Scan:-Memory objects,registry,FileSystem and Extra&Heuristics,under Settings tab.The Quick scan ran upto file:-Microsoft.Net/Framework/v2.0.50727/diasymreader.dll and mbam froze alongwith pc.I've reset the pc and again did a quickscan,but the freezing repeated at the same spot. Then,I disabled "Always Scan FileSystem" under Settings tab,and the MBAM completed the quick-scan fine. I tested by uninstalling the MBAM and again downloded Vn.1.40 from CNET and installed afresh,but the same position of freezing,repeated when the scan reaches .NET frame work file diasymreader.dll(which the previous vns. of MBAM did not have for the past one year.) I scanned with AvastPro&SpywareDoctor and there is no infection of any-kind in the pc. I think this bug of File-System- scan is to be fixed by Malwarebytes ? Thanks in advance.