Yesterday, 5/17/12 I ran PCTools which is my primary antivirus using a quick scan and a full scan. Found nothing. I updated MWB with the most current database and thenI followed up with a full scan by Malwarebytes, and it identified DFDwiz.exe as Trojan Fake Alert. Foolishly I told MWB to quarantine it. Now I have learned that it was a false positive, but I am now missing DFDwiz.exe. It shows in the MWB quarantine log as quarantined, and I tried multiple times to restore it but nothing happened. I went to the folder where it is supposed to be and the folder is completely empty. Does anyone have a suggestion about getting a copy of DFDwiz.exe or of how to restore the file that got quarantined? The file I had was last modified 7/13/09 and was 77.5kb. File version was 6.1.7600.16385. The log message I got from MWB was: C:\Windows\winsxs\amd64_microsoft-windows-d..ostic-user-resolver_31bf3856ad364e35_6.1.7600.16385_none_2129f6bd1f6002ae\DFDWiz.exe (Trojan.FakeAlert) -> Quarantined and deleted successfully. My computer in all other respects is running perfectly - no difference from before yesterday. No signs of virus activity. I am concerned that my registry was altered by MWB as well, but I have no specific basis for that concern.