Editing W7 Registry from Windows Install DVD

September 27, 2010 at 11:54:28
Specs: Windows 7
(Windows 7, Ultimate, x64, on a badass modern machine :P)

I was messing around with some prefetch options in my registry and did something pretty awful: now when I try to boot into windows, I just get a blue screen and computer restart. The bluescreen is a vague "run chkdsk /f and check for viruses" bluescreen; no help. Last Known Good Configuration doesn't work and neither do any safe modes. Chkdsk /R is fine.

The only thing I can do at this point is load up the windows DVD. This isn't a recovery console question, though -- the OS running a command prompt from the DVD is relatively fully functional (if still just CMD). It runs fine, gets me to a command prompt (with my C: now delegated E:). Unfortunately, typing "regedit" pulls up the registry for the *running* OS, which is the DVD OS, not the one on the HDD. How do I pull up the one on the HDD and save to it? I even have a registry backup from (a while) before I messed with it -- sitting in my documents folder. I also know what key I messed up (which I would much rather just change than pull up an old backup). I think there's something I can do with the "reg query" commands, but I don't know how that works.

(I have no access to the internet right now, except at work, or a burner or thumb drive, so I can't download bartpe or anything like that. There has to be a way to do this from the standard windows command line across to another windows os/registry.)


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#1
September 27, 2010 at 13:31:22
Did you try the restore point from the dvd?

You can edit the sam file but I never tried it with the live dvd. Wonder what regedit would do?

Usually one uses a live cd like bart's PE or vista pe or linux with online tools to edit the registry.

Why did it take me over a year to phone in a problem to ATT?


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#2
September 27, 2010 at 13:48:50
No restore point, no Last Known Good Configuration.

The only outlet to the internets that I have is work, where I would be fired on the spot for any "data leakage" (usb data, burnable CD, etc.)

Regedit.exe *works* from the Windows install DVD. It's just a matter of how to import the one from the HDD, edit it, then export it back again. Should be basically the same process as a live DVD, since it appears that the install DVD runs as a live rudimentary WIndows 7 CLI. However, when I've looked at forums for bartpe etc, they just say to run regedit, make the appropriate changes, and save. Like I said, in my case, when I run regedit, it brings up a very basic, mostly-empty registry that is the one for the OS that's *running* (off the DVD), not the OS on the E: drive, which is the one I need to fix -- how do I edit THAT registry?


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#3
September 27, 2010 at 15:37:04
Hopefully, I can get an answer in the next two hours, because that's when I leave work :(

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#4
September 27, 2010 at 18:00:40
As I said before. "Wonder what regedit would do?"

Why did it take me over a year to phone in a problem to ATT?


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#5
September 27, 2010 at 18:05:58
What? I said in both replies exactly what regedit did and my further questions about how to import/export to/from it. Like I said in both posts, regedit pulls up a mostly-blank registry for the currently running basic W7 CLI OS. I want to know how to use it to pull up the OS from the HDD, change it, and export it back...

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#6
September 28, 2010 at 05:22:49
well you could run a factory restore, you will lose everything on the c; drive, but your machine will still work..or try a repair of the os from the repair/recovery cd

i hate computers!
but cant help myself....


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