Putting a drive with its OS in a whole different system often/usually results in either this Automatic Repair thing, as it is trying to fix itself to run in the new hardware, or complete fail to boot.
If the automatic repair does not eventually fix it...you are out of luck trying to make it boot in the different hardware.
Hi thanks for quick reply, the idea for the experiment is this, I have two PC the Acer I mentioned and a Dell Optiplex both older machines.
Firstly I was going to get a new SSD to put in the Dell PC, but I realised that I can only have one drive and for the other I need to sacrifice the optical drive which was a bit naff but I was going to anyway.
Then I remembered about my old Acer lying in the cupboard, that had two drives but both are knackered and they were running Windows 7xp at the time, so I had no idea if my Acer could cope with windows 10, I knew my Dell had a working drive, so that's when I had the bright idea to swap them over lol, but I didn't realise windows wouldn't recognize the hardware dough.
This was all really down to wanting two drives, one that would be fast, and one just for storing data, and as you guessed I'd like to keep the optical drive, and that's why I thought of my Acer which has an optical drive also.
So after that long speel lol, I would appreciate if you had any ideas how to solve this dillema, with a way of testing if the Acer could cope with windows 10, despite not having any working drives, and now you've made me aware that I could mess up the drive from my Dell, which I don't want to do thanks.