Action Center on Windows 7 Reports avast! Antivirus 5 Free is out of date

I just installed avast! Antivirus 5 Free onto my computer, which is running Windows 7. After it does the very first update, the Action Center immediately tells me that it is out of date. When I click on the “Update Now” button, it does nothing. The message does not disappear from the Action Center. >:( What is going on here? ??? Could someone give me help as soon as they can? That would be really appreciated! ;D

Did you restart after install?

Is your computer time / day / date / year correct? if not adjust and restart

Have you tried avast repair and restart?
For a repair of avast. Windows, Add Remove programs, select ‘avast! Anti-Virus,’ click the Change/Remove button from the pop-up window, scroll down to Repair, click next and follow.

It could be something as simple as the System time is set wrong.

Alright, everything is OK now. Yes, I did restart after installation, but all I did then after that was uninstall the email scanner. Then, everything was normal. Also, I did have my date, time, and year set correctly.