Gameservers getting stuck on CPU0 upon reboot

[xpservers]

Just wondering if anyone experienced this issue.

 

Since we upgraded our Os from Windows 2008 server to Windows 2008 server R2 (Windows 7 server) we notice every time a box is rebooted the game servers lock to CPU 0. I have it set for 15 second delay to load each service but still cant seem to find the issue. The fix is to reboot every game service after say 5 minutes of uptime and then they load balance between the 4 cores.

 

This is happening to all my boxes that have been upgraded. Looks like Windows 7 sleeps the other 3 cores when loading the applications or something.