The path to the install is C:\Program Files\Malwarebytes' Anti-Malware not C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware. Also, no rules.ref file is found there either. C:\Program Files\Malwarebytes' Anti-Malware>dir Volume in drive C has no label. Volume Serial Number is DC61-1287 Directory of C:\Program Files\Malwarebytes' Anti-Malware 07/16/2010 01:53 PM <DIR> . 07/16/2010 01:53 PM <DIR> .. 04/29/2010 11:46 AM 1,113 changes.rtf 07/16/2010 01:22 PM <DIR> Languages 01/04/2009 07:31 PM 4,124 license.txt 07/16/2010 01:53 PM 5,195 mbam-info.txt 03/29/2010 02:51 PM 35,157 mbam.chm 04/29/2010 03:39 PM 350,544 mbam.dll 04/29/2010 03:39 PM 1,090,952 mbam.exe 04/29/2010 03:39 PM 85,328 mbamext.dll 04/29/2010 03:39 PM 437,584 mbamgui.exe 04/29/2010 03:39 PM 304,464 mbamservice.exe 04/29/2010 03:39 PM 46,416 ssubtmr6.dll 07/16/2010 01:22 PM 20,228 unins000.dat 07/16/2010 01:21 PM 716,624 unins000.exe 07/16/2010 01:22 PM 10,562 unins000.msg 04/29/2010 03:39 PM 496,976 vbalsgrid6.ocx 04/29/2010 03:39 PM 79,696 zlib.dll 15 File(s) 3,684,963 bytes 3 Dir(s) 140,940,197,888 bytes free C:\Program Files\Malwarebytes' Anti-Malware>