Have a system running XPpro SP3 been using AVG all along. With ZoneAlarm as Firewall.
When AVG 9.0 ask to upgrade, I did download the upgrade version.
During installing, a window popped up saying " ....\temp\COREx.cab " has an invalid digital signature.
and provide a log file and I have to EXIT.
Checking the net, someone suggest to download the full version. That fixed his problem.
So I did just that and try to install. Same window popped up.
Another suggest to unstall the old and install the new version, so I did. Still the same window popped up.
Search AVG forum did not find any that resemble my problem.
ps : cannot find the log files as mentioned in ' read first post' .
tried zip the file but it's still 1.4M.