Windows Update is a bit flaky about making the offer to enroll a Windows 10 system in an extra year of security updates. If it's not showing the offer, this can make it re-check whether your system qualifies: cmd /c ClipESUConsumer.exe -evaluateEligibility| Hyperborea: New Posts
You can reinstall Windows on a Surface tablet or laptop using a hardware-specific recovery image and a USB drive. Microsoft will want you to log in and provide the serial number of the device you want to reinstall.| Hyperborea Tech Tips