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Windows 7: windows\system32\kdcom.dll  is missing or corrupt

Posted on 2011-09-30
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Last Modified: 2012-05-12
I am working on a windows 7 laptop which fails to boot due to:

File: \windows\system32\kdcom.dll   Status: 0xc0000221   Info: Windows failed to load because the kernel debugger DLL is missing or corrupt


Startup repair also fails, it detects the corrupt file but fails to repair it.
I have tried using SFC, a restore point, as well as booting off a linux disc and replacing kdcom.dll with a copy from another system that doesn't have problems.

Any ideas aside from reformatting/reinstalling windows at this point?

Thank You.
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Question by:jspaziano
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7 Comments
 
LVL 30

Expert Comment

by:IanTh
ID: 36891101
try virus live cdrom

see
http://www.ampara.info/php/index.php?option=com_content&view=article&id=111:avg-live-cd&catid=30:software-technology&Itemid=85

 i bet its a virus and using a live cdrom out of windows will help
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LVL 2

Author Comment

by:jspaziano
ID: 36891121
thanks.

i did use the AVG bootable disc as well, viruses galore which were all removed but still can't fix the file that windows says is corrupted even though i know i'm replacing it with a file that's not corrupted
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LVL 30

Expert Comment

by:IanTh
ID: 36891186
did you update your live cd before scanning

you may be forced to do a fresh install sorry if thats going to cause you problems
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LVL 4

Expert Comment

by:bloodygonzo
ID: 36891263
You can try booting to your windows 7 cd and choose to install windows. Then when prompted select upgrade. This will reinstall while preserving user data and programs.
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LVL 2

Author Comment

by:jspaziano
ID: 36891538
thanks, i will give the upgrade a shot.

the live cd was updated and found a bunch of infections which were deleted.
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Accepted Solution

by:
jspaziano earned 0 total points
ID: 36893006
You can't do an in-place upgrade to do a repair install of windows  unless windows is in a bootable state (that's brilliant of Microsoft since a startup repair doesn't always fix the issue)


i wound up just reformatting/reinstalling
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LVL 2

Author Closing Comment

by:jspaziano
ID: 36915503
had to reformat the system, all repair attempts failed to resolve the problem
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