Hi,
I did renew my subscription for Avast Pro on March 2014(for 3PCs) and everything was OK.
Since yesterday I have strange problem with my Avast Pro antivirus - program became inactive and asks me to renew my subscription.
My subscription status has changed to expired.
In Avast settings->subscription I can see the following info:Subscription is valid till: 30.03.2015 - 0 days remaining :o
I have sent trouble ticket, but still didn’t receive answer and my PC is unprotected 
HI I would try a repair of avast if you have Windows 7, vista go to start menu click on Control panel and click on programs and features and then look for avast and click on avast and highlight repair avast and click next when the repair is done restart your computer and see if avast is running normally.
I hope this helps.
You did the renewal one year ago.
If you took a 1 year subscription it is logical that is has expired now.
For how many years did you bought the license?
Is your system clock still showing the correct date/time?
Is the problem on 1 system only or on all 3?
What OS/SP?
Hi,
It was variant number 2 :o
2) Is your system clock still showing the correct date/time?
But how it is possible - I didn’t changed the date - it was set 2015.
I turn it back the date to 2014 and now Avast is OK. 
Very strange…
Not strange at all.
It means your cmos battery needs to be replaced unless something in the system is really broken.