On Thursday morning, the protection programs of AVG incorrectly identified the Windows system file wintrust.dll as a Trojan of type "Generic32.FJU". Under certain circumstances, the virus hunting software has also labelled programs as malware if they attempted to access the supposed Trojan DLL. Users who deleted the file could not boot their computers any more. http://www.h-online.com/security/ne...Windows-system-file-for-a-trojan-1823171.html Though the problem was fixed by an update, this is not the first time that AVG cripples the system by mistake. My opinion is that those who want a good free antivirus, would do better to get AVIRA or AVAST.