Avast not in startup anymore

I have updated to avast 8 from GUI and now avast is not starting up with the PC. I have to open it manually everytime. How can i make it startup automatically. I have already heard of backing up settings, uninstalling and doing a fresh install… thats a tiresome process, is there any quick fix for this. ?

Try a repair and reboot first, if’s that is unsuccessful then follow the clean install route.