I can find the keys and everything but I don't know how to turn them into keys that I can use to decrypt the files. The file system is exactly the same as it was when it was still bootable and I still know the user name and password. I've tried a bunch of fixes to get windows working again but for whatever reason I don't think that is possible. Now that drive has became unbootable (which I think was because of a BIOS upgrade but either way) and I want those files on my current windows drive. I had some valuable files on my Windows 10 system that I encrypted with windows built-in EFS. There are many questions like this one but this one is mine.