Apologies if I have already asked this questions, but I need more help Before installing the Windows 10 Tech Preview I followed the guide and created a USB recovery flash drive. No errors although I used an 8 GB drive instead of the 16 GB that was stated as requirement. As far as I could see, the used space was approx. 6 GB. Installed the W10 DP without any hickups. Have been using it with success, but some things made me regret the update so I decided to use the recovery drive to go back to 8.1. Boot the recovery drive using vol down + power. I get a menu letting me choose language (Norwegian, Danish, Finish, Swedish). Selects Swedish. Next screen is keyboard layout. I choose Swedish here too. Third screen have the following options Exit and continue with Windows 10 DP Use an USB drive for recovery Advanced recovery options I select Use an USB drive ... The system reboots but instead of starting the recovery I am back to the same menu. I downloaded the recovery zip file from Microsoft using my serial number as input. This file is also approx. 6 GB. I followed the guide at the MS site and formatted the drive as a bootable disk and unzipped to the drive. No errors. But I get the exact same result with this downloaded recovery image. I have tested the USB stick on another computer and it boots to the same menu, except that the "Exit and continue" now says Windows 7 which is correct. Also, there is no "Use an USB ...". Since this machine is not a Surface Pro 3 I guess that this is expected. So the only remaining theory I have is that the size of the USB is important after all. Shall I buy a 16 GB stick and try with that one instead? Help?