I installed windows 10 on my Linx 10 tablet which had windows 8.1 with bing. I decided to revert back to 8.1 and then it all went wrong. The machine rebbots aa few times and thenget the your pc has run into a problem followed by your pc couldn't start properly and a required device isn't connected or can't be accessed error code 0xc0000225 It then takes me to the bios and if I select boot from usb with a bootable usb I can get into recovery mode but thats where it ends. I have all the restore options but none seem to work. I can get into cmd prompt and can see windows.old file. I have contacted mirosoft and at the risk of spending the rest of my life waiting from the to call back (which they have promised to do twice and failed to do) I really would like to be able to fix this before windows 11 is released. Please can anybody help?