Check that it is set it to update automatically - open AVG and click Control Center. Highlight Scheduler, and then click on Scheduled Tasks. Highlight Update Plan in Basic Mode and click Edit Schedule. Click Periodically Check for Updates, and select your two hour time slot. Tick "If Internet Connection is not available, check when it goes online" and OK and Close etc.
Adobe is nothing to do with AVG. If you meant to say AVG has been blocked, then go into Windows Defender and make sure you ENABLE it as follows