Acer aspire one messenger

Everything worked fine , until just one moment aao orignial messenger won't startup .
Everything else works fine skype , e-mail , gimp or what so ever programs .
What to do??

 

Cmon , its not normal . Anyone any ideas? At the evening it worked and morning didn't work .

 

Did you do any updates? More information will allow more people to offer help.

 

No updates recently.
No downloads or whatso ever near a week .
I used messenger properly at night and next morning when i turned computer on it didn't work anymore .
Loading circle comes around mouse icon and makes few rounds and nothing happens.

Seems like i have to make format .

 

Mine stopped working due to some certificate issue...no idea what it was.

So I uninstalled it and installed AMSN instead.

 

does anyone have any advice as to why this has happened? mine is doin it too!!! :?:
worked fine last night now just wont load, getin loadin circle for split second but thats it????