johnhc. Thanks for that information. I looked in the NLITE.IN_ file, which has a list of registry entires, but I do not know how these will shed any further light on the problem. The error no longer occurred when I changed the OEM Preinstall to disabled. The default setting is enabled. I did not install any OEM files. I assumed this was the cause of the error, but I could be wrong. All component removal appears to be OK.