I recently got hold of an older HP Media laptop with Win7 installed. I swapped out the hard drive for one with Win10. When I start up the laptop, it's telling me that no OS is installed. I could use some guidance, please.
The drive came from a dead screen laptop. All drive tests pass. I thought that maybe it was the "Optane" memory, but it's not. The "new" drive did work fine when I put it in my desktop. The old drive works, but it's Win7. And there are no partitions.