OK since i got AVG its been doing great. Everyday it updates itself right at startup and then i go on to my daily things. Lately the tray icon has been black and it says i need to restart my computer (every day) and so i do. and then it updates. Today i restarted my computer 3 times and it still says that i need to restart it. I pushed "check for updates" and it says "update unsuccessful" what is wrong?