Virus definitions are out of date

Elyzabeth,
Try this latest installation file: http://files-download.avg.com/inst/mp/Internet_Security_1824.exe and check if it helps. We are here if you need further help.

Hi,
I have been unable to update the virus definitions.

Hello Farley,

I am sorry to hear this.
The update issue is a known one and to resolve it, please reinstall AVG Antivirus program.
For uninstallation, refer this article: http://avgread.me/1DEtNP0 .
To install AVG Antivirus free, follow the instructions as mentioned (here).
Keep us informed about the status.

Elyzabeth,
Try this latest installation file: http://files-download.avg.com/inst/mp/Internet_Security_1824.exe and check if it helps. We are here if you need further help.

OK I will reinstall. Thanks.

I have AVG Free. I have been unable to update the definitions on 3 of my devices for 3 days now. One of my devices is a laptop with with Windows Vista. The other 2 are tablets with Windows 10. It starts to update, and about 5 or 6 seconds it says invalid signature file and process is terminated.