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Oct
2
comment Can I fix error 0xc0000225 without reinstalling Windows?
Yeah, exactly. I awarded the bounty to the other answer because Tom's tip about setting the partition to active was the key to fixing my problem, and I accepted it because I figured the answer I accept should be the one that contains the actual solution, for the benefit of future readers, even though you did suggest using bootrec first.
Oct
2
awarded  Benefactor
Oct
2
comment Can I fix error 0xc0000225 without reinstalling Windows?
The other answer identified the solution I needed, but I appreciate your persistence. (I'd offer up a smaller bounty for that if I could, as a symbolic gesture.)
Oct
2
accepted Can I fix error 0xc0000225 without reinstalling Windows?
Oct
2
comment Can I fix error 0xc0000225 without reinstalling Windows?
This turned out to be the right problem (and solution), but your tip about setting the partition to active was the real key. I needed to make the partition active so that bootrec would know where to write the rebuilt BCD. Perhaps you could add that to the answer? (I didn't have to use bootsect, as it turned out.)
Sep
30
comment Can I fix error 0xc0000225 without reinstalling Windows?
Let us continue this discussion in chat.
Sep
30
comment Can I fix error 0xc0000225 without reinstalling Windows?
I've been using 1-based numbering, so there is no drive #0; anyway, yes, the drive letter does change to C when I disconnect drive #1. Throughout the whole process I've never disconnected drive #2 (the one the question is about), and I haven't changed which connector is attached to each drive, so there's no way the connectors are inverted.
Sep
30
revised Can I fix error 0xc0000225 without reinstalling Windows?
fix drive lettering
Sep
30
comment Can I fix error 0xc0000225 without reinstalling Windows?
I've edited the question to include that output. As I noted there, the effects of all these commands appear to be the same (i.e. no effect) whether all drives are connected or not.
Sep
30
revised Can I fix error 0xc0000225 without reinstalling Windows?
add more output from command-line tools
Sep
29
comment EFI System Partition for Dual Boot Windows and Linux
Actually, you can have more than one ESP. I have a dual-boot laptop with a separate EFI system partition for each OS and both of them boot just fine.
Sep
29
comment Can I fix error 0xc0000225 without reinstalling Windows?
There's an NTFS data partition on drive #1 (an SSD), which the recovery environment maps to C:. (Of course when I was able to boot into Windows, the Windows system partition was C: and the data partition was E:.)
Sep
29
revised Can I fix error 0xc0000225 without reinstalling Windows?
add output of command line tools
Sep
28
comment Can I fix error 0xc0000225 without reinstalling Windows?
Actually repair doesn't let me select the Windows partition. Sorry not to make that clear. The screen where I would select a partition looks like this - no partitions listed - and I get to Startup Repair by just clicking "Next" anyway. I'll edit the question with this and also the output of bootrec.
Sep
28
comment Can I fix error 0xc0000225 without reinstalling Windows?
I can access any file on the Windows partition by mounting it under Linux - viewing, copying, deleting, editing - with no problems. (I haven't tried them all of course, but a representative sample yielded no errors.) I don't see a way to boot the DVD into DOS; can you point me to instructions? When I try Startup Repair I get the message "Startup Repair cannot repair this computer automatically".
Sep
25
comment Can I fix error 0xc0000225 without reinstalling Windows?
No, I can't. The article explicitly says (multiple times) that you need to be already running Windows to perform a repair install; besides, I tried it, and it won't let me use the Upgrade option when booting from a DVD.
Sep
25
comment Can I fix error 0xc0000225 without reinstalling Windows?
Looking at it now, I see that a repair install can only be done from within Windows, so that doesn't help me.
Sep
25
comment Can I fix error 0xc0000225 without reinstalling Windows?
Ah, well that was intentional. I tried using Windows to resize the partition first, after emptying the Recycle Bin and defragmenting (forgot about disabling special files though), but it wasn't able to reduce the partition size as much as I needed it to. I'll try the repair installation and see if it works. If not, then I can mount the Windows partition from Linux and copy any useful files to another partition, so I won't have to resort to data recovery.
Sep
25
awarded  Notable Question
Sep
25
comment Can I fix error 0xc0000225 without reinstalling Windows?
@RsyaStudios The graphical installer doesn't detect my existing Windows installation, so I don't think I can do that.