Please help, freeze issue:S

[DefQon1]

Here is the problem, yesterday i downloaded movie converter, and it asked me to restart. I restarted and after log in, after 1minute my vista freezes...all i can use is MSN, this is only program what is working, other programs are freezed. Also what i noticed that when my pc freezes, some ´´world shaped´´ icon comes to my start bar, green coloured. Im running 64bit vista. Ive run vista for more than 8months without any problem:S
My specs
E6300 @ 2.9Ghz
4GB RAM Corsair CL 2.0
ATI 3870x2 in crossfire
HDD 250GB Samsung SATA

Vista has run on same setup all the times...please help

 

[DefQon1]

guys 2hrs has passed and no replies?

 

[mansrm81]

Uninstall the video converter since it started when you installed and restarted your computer.

 

[motarola2]

boot into safe mode and try a system restore

 

[AstaLaVista]

That does not make any sense to me but, if I was you, I would do what the others have recommended... I know that's what I would do first.