I have just noticed in the device manager of my new PC, under 'other devices', something called 'coprocessor' is listed with following status: 'The drivers for this device are not installed. (Code 28) There is no driver selected for the device information set or element. To find a driver for this device, click Update Driver.' I have tried to update driver automatically- no luck. What is the coprocessor and does anyone know which driver I need or where to try and what to search for? My system: AMD Athlon 7750 Dual- Core processor (2.70 GHZ) 4 gig RAM Windows 7 x64 Home Premium Nvidia Geforce 8200 ASRock K10N78FullHD- hsli motherboard The PC originally came without OS and included an ASRock 'AMD- nVIDIA series support CD- Rom'- user manual, drivers, utilities. I have tried the disc, which does contain drivers when browsed but it wont auto install them. Any advice appreciated, cheers.