János, Tóth F. wrote: > I tried to reinstall the USB driver from Argyll_V1.6.1_src.zip after > uninstalling the old one (actually the same) and Windows 8.1 rejected it. > "The hash for the file is not present in the specified cataloge file." Hi, I've no idea. It seems to work fine on Win8, and it was created the same was as the ones Mathieu Grenet found to work on Win8.1. Does your c:\windows\inf\setupapi.dev.log show any more detail ? Graeme Gill.