partition 1
I believe this is incorrect. The correct partition to choose is Primary. This is the partition Win10 is living on. Following these Microsoft instructions while working on a Win10 laptop, I shrank this OS partition by 250 MB and then re-created the WinRE partition, which grabbed the extra 250 MB and was now large enough. When I got to the step of re-enabling WinRE, however, that kept failing. Per other MS instructions, I conducted a Win10 repair using a Win10 installation thumb drive. When that was finished, I checked and found WinRE was enabled. At that point the update installed correctly.
Then I tried the same process on a Win10 desktop. I keep getting failure because the SHRINK command tells me there is no room in this partition to shrink. I confirmed this by running the SHRINK QUERYMAX command, which says there are 0 MB available for shrinking -- which is crazy because there is 250 GB unused in the Primary partition. Other MS guidance says this can occur because “Additionally, you cannot shrink a volume with unmovable files located in the middle of the partition. If there are page files or other unmovable/locked system files at the end of the volume, it might also cause the problem there is not enough space on the disk to complete shrinking volume.”
I am reluctant to try the PowerShell script; I figure that if I can't make the process work by manually entering each command one by one, there's no reason to think an automated process will succeed -- and I will have even less visibility of what's going on.
Any suggestions on what I can try next?