Avast background service not running

I have Avast Internet Security, it automatically starts whenever I switch on my windows 7 P.C. yesterday it didn’t start up like it normally does.
Opened up the program and it says the background service isn’t running, it had the option to ‘start’ it back up which I clicked and nothing has happened.
Tried to repair it by going into uninstall program but it won’t let me do anything.
Subscription says it active and when I go on the internet it still seems to be running like normal, i just can’t seem to run scans or do any updates.

Anyone have any ideas?

Have you tried another reboot? if that fails then you could install a new version over the top or perform a clean install.

If you need help with a clean install, take a look at:
https://forum.avast.com/index.php?topic=93544.msg1201631#msg1201631