Hey Bodgekin Thanks, yes that turned out to be the case. The drive is also a 7mm deep one. The SSD and diskdrive are cradled back to back so a regular notebood SSD won't physically fit. When I took out the faulty drive, the USB recovery disks booted just fine. I installed Windows 10 from Microsoft's support site. The first couple of times it got stuck in a boot/crash loop citing different reasons for the failure. When I removed the secondary drive it installed fine. Then I put it back in after install and it's mostly been running OK. It did crash once but rebooted into Windows afterward. This is the second Kingston 250Gb SSD that has failed like this, albeit in different machines. Anyway, thanks for your help.
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