My Avast doesn't open (Windows 7 64bit)

I am desperately asking for help. In the last 2 days my “avast!Free Antivirus” just doesn’t open. It’s not that it is not working or it has turned off but the main window with all these options and stuff doesn’t open. I’m trying to run the program as the administrator but nothing changes…The icon doesn’t even appear in the taskbar…

I really don’t know what to do.

P.S. Be kind with my grammar mistakes, english is not my native language…

try this

controlpanel > ad/remove programs > avast > uninstall > repair option… wait a minute and reboot

any change ?

Nope!

Well anyway… Today is a new day and everything got back to normal… :smiley: Don’t ask me how or why, I really don’t know… :-
Thank you anyway…