Thanks for the suggestions.
“Was the original WD2500AAKX that you removed also set to AHCI mode in the BIOS?”
Yes - the Bios has one SATA Mode button, it’s always been set to AHCI.
Can I repeat something - I had the WD2500 running in the machine for over 18 months. I took it out, put the WD10 in and did nothing else and since then no go.
On the second suggestion that’s now been done several times now across all three of the WDC drives that I’ve tried to install in that machine. The driver software doesn’t load.
Any more ideas would be really welcome…
