If mole44's idea doesn't work just try again later, you may get a checksum error which means AVG's server is busy, AVG is a great Antivirus but a victim of its own popularity because it works so well...
A number of people seem to be transferring from AVG to Avast, due to its automatic updates. I use both AVG and Avast, each being on separate computers. Even though I am very satisfied with AVG,it as served me well over a number of years, but at times it can get annoying, especially during and after some updates. Avast click here
The simplest thing would be to download a complete new copy of AVGFree. Delete the previus copy before installing the new one. There is no advantage to Avast over AVG in respect of automatic updates - you can set AVG to update automatically, including every time you start up your PC if you want it to do that. Better is to use the Control center and choose your times, frequency, etc from the Update manager & Scheduler. You can also update "manually" in addition if you want/need to.
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