My system: AMD Athlon 7750 Dual core (2.7 gig) AS Rock K10N78FullHD- HSLI R3.0 AM2+ Socket Motherboard Windows 7 x64 Home Premium BIOS vsn: P1.90 Under device manager, the coprocessor is listed as: 'The drivers for this device are not installed. (Code 28) There is no driver selected for the device information set or element'. Windows update doesn't find it. I have downloaded the 'All in one' driver from ASrock website, which includes: Ethernet Driver (v73.10) WHQL Network Management Tools (v73.13) "Sedona" SATAIDE Driver (v126.96.36.199) WHQL SATARAID Driver (v188.8.131.52) WHQL RAIDTOOL Application (v184.108.40.206) SMBUS Driver (v4.69) WHQL SMU Driver (v1.71) WHQL GPU Driver (v186.34) WHQL PhysX (v9.09.0428) Away Mode Driver (v6.0.6000.111) WHQL Installer (v7.53) much of which I dont think I need/ is already on there and wouldn't know how to install anyway (do you just look for the .exe setup files?). ASrock's website also lists BIOS updates and Tmagic650 said this might be needed to 'see' the coprocessor. Problem is, which version: the latest vsn 2.10 is described as 'update code for MAC address'. vsn 2.0 is listed as 'update CPU code'. The next one, vsn 1.90 is mine. There are also 2 downloads for each vsn: DOS and Windows- I assume I should use the Windows one and folow their installation guidelines? Sorry for the long post, but as you can tell, I need all the help I can get. Any advice appreciated.