I’ll download the newest version
In my Avast program there is a Sign in towards the top right of the screen, not sure if that’s just for facebook or what
Run FRST and press Fix
On completion a log will be generated please post that
THEN
Please download AdwCleaner by Xplode onto your desktop.
[*]Close all open programs and internet browsers.
[*]Double click on AdwCleaner.exe to run the tool.
[*]Click on Scan.
[*]After the scan is complete click on “Clean”
[*]Confirm each time with Ok.
[*]Your computer will be rebooted automatically. A text file will open after the restart.
[*]Please post the content of that logfile with your next answer.
[*]You can find the logfile at C:\AdwCleaner[S0].txt as well.
After trying for a day to get passed “Internal Server Error”, and writing customer service, I uninstalled Avast Pro and rebooted my laptop. Then I downloaded the Avast Free version and got it running so I had some protection. I signed in on the free version, clicked on the option to upgrade, Avast found my Pro activation key and upgraded and updated. The Pro version is running as if nothing had ever happened.