I bought Avast! 5 Pro a month ago, registered it with the key and was well pleased, 4.8 had been running slow. The Maintenance panel showed the expiration date two years in the future, as it should. But on April 4 my Avast! announced that it was not running and a little investigation revealed the license was not valid (error 00000002). Also there is a summary.txt file in the Setup folder stating the same thing. Task Manager shows the AvastSetup.exe process starts briefly then goes away.
I emailed support@avast.com, no response yet.
I tried inserting the license file with the same results. (00000002)
On this forum I found the /resend-lic.php which rapidly returned a license file, compatible with managed network distribution,that returns the same error.
Funny thing, the version in the Maintenance view states build 5.0.462, which supposedly addresses this issue.
Dell laptop Windows XP Pro SP3