Avast won't start at startup

Hi there,

I’ve been having a problem since I upgraded to Windows 10 on my computer. Since then, every time I start it, Avast Free won’t start (the icon doesn’t appear either on the tray). I have to open it manually or otherwise I’m unprotected. I tried repairing and later reinstalling it (also running C Cleaner to erase the register entries) and NOTHING.

Is there a solution for this?

Thank you