Many thanks to every body who posted advice. I've found a fix for my prob, and have now got the CDRW installed
My PC was running in DOS compatability Mode which, amongst other things prevents the protected -mode drivers from initialising when Windows starts. When this occurs, a NOIDE value is placed in the registry which prevents windows from making future attempts to initialise the protected-mode driver.
If anyone else has similiar probs go here: http://www.support.microsoft.com/sup...pics/hardware/