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An old AMD Duron cpu with NForce 215 chipset wouldn't have been seen until 2001 when the chipset first arrived. Comparison of Nvidia nForce chipsets - Wikipedia, the free encyclopedia
The AMD Duron cpu line only came out during June 2000. Duron - Wikipedia, the free encyclopedia I doubt that was the board that saw 95 running in the mid 90s! If the system originally saw 95 he likely swapped boards out when XP first arrived as part of the need for hardware as well as the OS upgrade. As for the old drive if original and not one bought afterwards that would be about 20yrs. old and not a good option at this time! He must have used a 40pin to 80pin ide adapter to get around the need for those old ide ribbon cables in order to continue using the drive back then.
WD brought in the EIDE(Enhanced IDE) or ATA-2 back in 1994 about that time while the Ultra IDE would be needed presently for the standard 80pin data cable. If you can post back with the make and other information seen on the drive labeling excluding serial number that can be looked up fast to find out just what drive that is you have there. For some general information on drives that can be looked over at Parallel ATA - Wikipedia, the free encyclopedia
Another thing you will want to provide a good break down for the actual hardwares in use is the free SIW(System Info for Windows) tool found at SIW | System Information for Windows by Gabriel Topala That provides a full breakdown of everything including the programs you have as well as the details for cpu, memory, video card even, and the mother board itself for a look at the specs.
Just remember that any hardwares that don't even see Windows 8.1 updates won't be much good for 10! That includes the main board itself where the ide as well as other onboard controllers are located. That would be the main reason for seeing 10 fail besides a problem drive.