When trying to launch the game in DX11 mode the resolution gets screwed up and the game runs in a thin like window. when I try to enter options to change the resolution turns out I cant as there is no resolution to choose from.

has anyone encountered such a problem?please advice.

hit the tilde key (~), try to manually set your resolution.

r_height = x
r_width = y

I get "Unknown Command". any other ideas

Are you using Windows8 CP? This is a common issue on that OS.

yep will try on win7 and report. but isn't there any workarround?

Not that I know of but I am only playing the MP since Windows 8 was released so it hasn't been an issue. I only need DX11 for the campaign. There is a thread in this section of the forum concerning it but I don't think those guys have found a solution either.

I see well not much of a loss didn't try it in windows 7 as I got the error that I used up my key so will just have to play in dx9. anyway thanks for youre help everyone!