Well after many attempts to fix the “C” drive vs “H” drive (USB drive) problems I have come up against a hard wall, also WD has started to act up, it would stop and nothing could get it started up again, I had to first remove the USB drive then restart the PC, then reinsert the drive and start WD.
I have checked the hard drive on that PC and all looks to be normal, also no problems found with that PC’s hardware.
So with a storm on the way I had to first find a computer with a serial port and one running XP, no luck, so had to go with one running W7 and use a USB to serial adapter, then do a transfer of WD and a reload, this seems have worked, and all is running normal.
The big problem were the data collection programs that the PC was running at that site, it took several days to get them up and running on a PC running W7 vs one that barely ran them with XP.
I have never figured out as to why that PC would not run WD on the main “C” drive, even with several full wipe outs and re-installs of WD, so it is a big mystery…