Lots of problems here:

[Littlepea]

It sounds strange...

My config is:
core i5
ram 4gb
video card nvidia gtx 460.

And It runs good with very high settings.

But I have the same problems with the sound settings. Can't change anything.
The same with the option for the quick battle or campaign.
It seems we could select our amno (fire bullets, explosives...) I can't.
It can't see any server in the multiplayer so I can't play in multi.
And the worst, I can't save my game in the campaign.

A lot of bugs with the settings...