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03.03.2008 at 08:46PM PST, ID: 23211718

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6.6

Corrupted Windows Registry - NTUSER.DAT

Zones: Windows Registry Cleaners, Operating Systems Miscellaneous, Windows XP Operating System

Tags: Microsoft, Windows, XP SP2

I'll try to be as brief as possible here, so I'll skip the explanations as to exactly how this problem came to be. But here's the current situation: I have a Windows XP SP2 installation and 2 user accounts setup on it. The one that I'm using is the administrator's one /with full privileges/ with a NTUSER.DAT registry file damaged! The file size is ~17MB and I would have posted it here if it wasn't for the 5MB file limitations here. I'm able to use my computer though and it took me a while to exactly pinpoint the cause of the erratic behavior of my system. Some of the problems include random windows installer popups, registry has been recovered by a log file or something error message upon logon, inability to uninstall certain programs and most importantly - blue screen crashes with page fault in non paged error message when I try to either run registry cleaners or to export registry entries or to run any sorts of registry analyzers. All of the above apply to my account only - the other one behaves normally.
Today I managed to localize something that I'm 99% sure holds the key to the resolution of the whole issue - there are some registry keys which for some reason cannot be renamed, deleted or manipulated in any way and which cause windows to halt - I suspect that's a serious bug in the Windows API. Using regedit I navigated to one such key and tried to erase it or rename it but each time I got an error message that the key cannot be deleted etc. I tried logging into the other user account and importing the hive with the same results. When doing an export of the registry I get a blue screen crash. I also have a windows xp x64 installation on the same machine and I tried the same thing from it - during the hash mount the system warned me that the file was damaged and there might be some data loss, but it loaded. When I attempted an export of the key I got another crash as well.
All that made me feel that I should use some sort of an offline registry editor to remedy the broken file. However finding one that doesn't use the windows api to manipulate the registry proved to be a challenge and I still haven't found it. Both regtool and regeditpro failed to do the job. Using windows registry file viewer however I manage to view the broken key - it has just one subkey, but this tool is just a viewer I can't edit the file. Using a hex editor also I managed to rename the broken key, but that doesn't help at all.
Finally - the question here is if anyone knows of a way to delete registry keys in NTUSER.DAT with a hex editor or if I can find a registry editor that doesn't use the windows api.
All other suggestions are welcome as well

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Question Stats

Zone: Software

Question Asked By: tlatev

Solution Provided By: tlatev

Participating Experts: 1

Solution Grade: A

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