There is one error in the Windows 10, which even the Troubleshooter is unable to fix. Well, it’s the “Service registration is missing or corrupt” error. So, let’s see how to fix it manually. There are various methods that can potentially work as a resolution. You can try them one by one, to arrive at the one that works for you.
When you on install Windows 10 OS on disk, EFI partition is automatically created. Though it is the useful thing but it takes up space on disk and it matters especially in a case of USB where space is limited. This article provides step by step guided tutorial on how to remove EFI partition from USD disk.