Device Manager Code 37 on Intel i7-4770

Hello,

I am runnning Windows 7 x64.

In device manager all my cores have Error Code 37 on them "Windows Cannot Initalize the device driver for this hardware".

I tried update driver and removing the CPUs in safe mode and rebooting. No help.

All other devices in device manager are installed (ie chipset drivers etc).

In device manager the PC is listed as a ACPI x64 based PC.

Anyone else have any ideas?

Thanks

-Al