Best answer as chosen by user Sunsetlover: RE: AVG and msiexec
Please be informed that AVG is using MS Installer technology, thus the program update process is run by msiexec. The installer technology is not newly introduced with AVG 2013. It was used with AVG 2011 and AVG 2012 before.
The Identity Protection component needs system reboot after a program update to be able to restart properly.
Hope this helps.