Sometimes uploanding anything crash my system.

Hi, here is a very strange problem. I ll gona give you some examples: 1 - I click to upload a image into a forum and system crash, mouse frezze and internet go away, but keyboard still work, tried to conect mouse in another place, tried to close the program via task manager, tried to restart system via task manager, a lot stuff i tried.
2 - My game Crysis crashed when I made a login in multiplayer, reinstall and hapeen 2 times, every time is when I click with the mouse, now I can´t play Crysis. 3 - When I was uploading a video into youtube did the same problem.
What I know? Is a problem whem I click to upload something. Can someone give me a tip? The system is new and this happen from the beggining. I think the problem is that I made firmware upgrade of my bios with windows 7 64 bit already installed. The only way I see now, is to format the system, but I had 4 days to configure all my stuff here. Maybe is something is register.

Thanks for any tips.

I already made this to my Wirelles card, let's see what happen now, I just need some time to see if system crash, if yes, I will return here. Thanks.

I think can be my wirelles card, so I ll try to use the internet concetion from the motherboard, anyway, sometimes more or less 1 time per week my system crash when I'm not doing things...wow, this is very strange but is not a serious problem.

If I have some news about my upload crash I ll post here. thx.