AVG Internet Security 2014 is ”Offline” and and cannot start

Henning, In order to analyze it please provide AVG with diagnostic output using this tool (http://download.avg.com/filedir/util/AVG_SysInfo.exe) and please add detailed description of issue.
AVG Guru

My paid full version of AVG Internet Security 2014 is ”Offline” and and cannot start.
Error message:"COREx.cab has an invalid digital signature"
I'm not sure if this is the right place to post this, but…

I have followed instructions to re-install my AVG with my valid license but it locks up. I keep getting the error:
"A file that is required cannot be installed because the cabinet  file C:\Documents and Settings\All Users\Application Data\AVG2014\SetupBackupCOREx.cab has an invalid digital signature. This may indicate that the cabinet is currupt."

How can I fix this? Thank you. July 28, 2014

Henning, In order to analyze it please provide AVG with diagnostic output using this tool (http://download.avg.com/filedir/util/AVG_SysInfo.exe) and please add detailed description of issue.
AVG Guru