After installing Windows 10 on another computer and really liking it, I decided to install it on my SP3. I have tried to boot using settings-recovery-restart now- USB device but it just reboots the SP3 bypassing the USB drive. I have successfully used this USB drive on 2 other computers using f8 to boot from USB so the drive and files should be ok. Any help would be appreciated. EDIT: Turned out to be a bad flash drive. Reinstalled on new drive and worked fine. Thanks to those who tried to help.