I have crash problem on zombies leaderboards.

I'm using Windows 8 x64 with latest updates/ Nvidia GT630M with stable driver , game files verificated-redownloaded-steam reinstalled

I'm changed my graphics driver from beta to stable.

I tried to close firewall, nat open to moderate

All of these not worked.

Version number: 13 25.0-1.1485802

Connectivity Info: A.B.C.-.E.-.-.-.-.-.-.-.-.....S (i dont know number of .-. in middle)

Nat type: Moderate (I'm changed from open to check)

IP and internal looks good.

And also i tried to install steam beta.Still nothing can fix it but 2 days ago its worked when i delete someone on friendlist.

I'm tried steam chat offline mode.

vcredist reinstalled.

Please help.Thanks.