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Old 18th September 2010   #1
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Can't open device manager


hi guys, seems like I need every help I can get here, as the title says, here's some detail about the error:

"MMC cannot open the file C:\Windows\system32\devmgmt.msc.

This may because the file does not exist, is not an MMC console, or was created by a later version of MMC. This may also because you do not have sufficient access rights to the file."

It was happened several minutes ago. About two days ago, my windows failed to start so I had to run startup repair two times, and after performing startup repair the computer was able to run but it took long at the startup. Is there any connection between those things(device manager issue and failed to start)?

Now for the main question, how can I fix this device manager issue?is there any fix?or should I perform a repair install?

I'm running a 32bit windows 7, and willing to provide any details if necessary. Thanks in advance.

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Old 18th September 2010   #2
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try this:
"fix it for me"
http://support.microsoft.com/kb/914231

then run an ms update and make sure you are up to date.

-------------
The above didn't do it? Other things to try, that have worked in the past:
what happens if you do start > run > cmd > eventvwr.msc ?
or start > run > cmd > services.msc ?

if you can't open anything ending in msc try this
http://www.dougknox....c/xp_mscfix.zip

if you can open those...but just not devmanager
try this
http://www.kellys-korner-xp.com/regs...gerrestore.reg

-----------------------
Google says this about your error:
MMC cannot open the file C:\WINDOWS\system32\devmgmt.msc


Last edited by goddez1; 18th September 2010 at 12:29.
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Old 18th September 2010   #3
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I tried the "fix it for me", and tried "let me fix it myself" too, still can't access.
Tried the xp_mscfix.reg but haven't restarted my computer yet, but I can't add devicemanagerrestore.reg.

When I tried "let me fix it myself" a window popped out and says the module "Msxml.dll" failed to load.

I'll try to see what google said about this

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Old 18th September 2010   #4
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Phooie Shame on me. Links refer to xp. I am in win 7 forum, darn it! While your a googlin', I'll help. Two heads may be beter than one. Sorry.

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Old 18th September 2010   #5
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Still looking for help, haven't found the answer I'm looking for in google

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Old 18th September 2010   #6
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Have you administrator rights?

Have you made sure uac security is not set to high?

Have you adjusted startmenu settings to http://maximumpcguides.com/windows-7...programs-menu/

Try startmenu search line and type in devmgmt.msc. Does this show up in list. What happens when you click on it? This should be located in the system32 folder.

Using the "administrator tools" either via in the startmenu or control panel, does the "computer managment" (mmc.exe) console come up? Does device manager show up in the console? What happens when you click on it using this.
To do so:
Startmenu button>administrators tools>computer management>device manager

Got the my computer icon on the desktop? Right click propertires should offer another method to open device manager.

Just typing device in the startmenu files search should bring up device manager.


Last edited by goddez1; 18th September 2010 at 17:01.
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Old 18th September 2010   #7
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Have you administrator rights?
I think so, I set my account as administrator


Have you made sure uac security is not set to high?
Sure, I turned off UAC, is this a problem?

Have you adjusted startmenu settings to http://maximumpcguides.com/windows-7...programs-menu/
done

Try startmenu search line and type in devmgmt.msc. Does this show up in list. What happens when you click on it? This should be located in the system32 folder.
done that already, when I click on it same message appears, MMC cannot open the file C:\Windows\system32\devmgmt.msc and so on


Using the "administrator tools" either via in the startmenu or control panel, does the "computer managment" (mmc.exe) console come up? Does device manager show up in the console? What happens when you click on it using this.
To do so:
Startmenu button>administrators tools>computer management>device manager

yes, device manager is listed there, and I can access device manager here

Got the my computer icon on the desktop? Right click propertires should offer another method to open device manager.
no, but when i right click on my computer(in start menu) properties, and selecting device manager, MMC cannot open the file C:\Windows\system32\devmgmt.msc and message appeared


Just typing device in the startmenu files search should bring up device manager.
This is what I tried all the time and still a no go


I'm wondering, if I perform repair install, will it fix the problem? but that's the last thing I'll do if all else fail

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Old 18th September 2010   #8
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Old 18th September 2010   #9
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Hi to both of you,

Runner
you jumped ahead of me. I had this info tucked away so here's my additonal input. I want to confirm that device manager will not open and run in any form. I wish to know computer history and why a startup repair was initially tried in the first place. I need to know if this computer is virus infection free and clean.

Tocchin
What you have done is a startup repair which is a Windows 7 system recovery tool that scans for and try's to fix certain problems such as damaged system files (MBR, boot.ini file, etc), that might prevent Windows from starting correctly.

Startup Repair

>cannot fix hardware failures [such as a failing hard disk or incompatible memory]

>nor does it protect against virus attacks.

>Startup Repair is not designed to fix Windows installation problems.

>Startup Repair is not a backup tool, so it cannot help you recover personal files, such as photos or documents. To help protect your computer, back up your system and files regularly.

Try a sfc /scannow or repair install will do the trick.

Run sfc to check for damaged or missing files:
http://www.sevenforums.com/tutorials...e-checker.html

Or your headed for a repair install, as you have asked and halfway expected.
http://www.sevenforums.com/tutorials...r-install.html


Last edited by goddez1; 18th September 2010 at 21:36.
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Old 19th September 2010   #10
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Yes, it was startup repair, three days ago my computer failed to start correctly, I don't know why, so windows prompted me to do a startup repair. The first one was failed, so I tried the second time with windows installation dvd.

sfc /scannow performed, but it can't repair some of the files, seems like I have to do a repair install, or is there any other tricks before I do this?


Last edited by Tocchin; 19th September 2010 at 01:31.
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Old 19th September 2010   #11
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booo!

I see you checked back into the board and forum. Any luck yet? Did you run sfc?

Opps! See we were typing at same the same time. Looks like you have some bad news after a file check. I assume the lack of a successful repair would indicate file corruption or harddrive damage due to, hopefully minor, memory blocks or crc's. Not knowing what your root cause was, prior to startup repair, sure makes this hard call. Damaged files or harddrive damage screams for either a repair install or, more likely, clean install. Better think real hard and take steps NOW to back up any data you wish to keep. You may even be facing harddrive failure somewhere in your near future. I hate to be all gloom and doom and realize these are leaped conclusions but experience often makes one a bit pessimistic in some areas.

I was going to offer a few other "device manager" ideas but it looks like you have bigger problems to consider.

Oh shoot! Try these anyway....
reregister these DLLs

startmenu > run
RegSvr32 MSXML.DLL
<enter>

repeat with the following
RegSvr32 MSXML2.DLL
RegSvr32 MSXML3.DLL

run line to try:
run line
mmc.exe devmgmt.msc

Do a file search for *.msc and check to see if any of these are also problematic.

Go to msupdate and check to see if you have a problem with updating. Suspect you may have "Microsoft XML Parser" problems, that's why I'm curious if you can update without a problem. We'll cross that road should we need to.

You can continue to nurse your computer along. Plenty of work arounds for "administrator tools" links, but I think you should consider the repair and get ready for clean install or, worse case, replacing harddrive.

==============
Thought just occurred to me. A virus would also cause file repair problems. I wonder if you should consider a trip to our virus/malware/adware forum. At least give this a shot before throwing in the towel.

Read this post, then post the requested log(s) in the Malware and Virus Removal forum.


Last edited by goddez1; 19th September 2010 at 09:01.
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Old 19th September 2010   #12
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Just as I thought, hard drive failure may be the problem

startmenu > run
RegSvr32 MSXML.DLL
<enter>

failed to load

repeat with the following
RegSvr32 MSXML2.DLL

failed to load

RegSvr32 MSXML3.DLL
only this one was succesfully loaded

Ah, about virus, I think I found something in my computer, I'll go to virus and malware removal right away.

Thanks for the help both of you

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Old 26th September 2010   #13
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This thread can be marked as solved, thanks a lot for the assistance


Last edited by Tocchin; 26th September 2010 at 04:57. Reason: problem solved
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Old 26th September 2010   #14
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Originally Posted by Tocchin View Post
This thread can be marked as solved, thanks a lot for the assistance
Please mark your thread as 'Resolved'.

Quote:
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We have added new functionality to the forum that allows you to mark your threads as 'Resolved'.

It is considered courteous to post a reply if you have been able to resolve your problem, or received an answer to your question. If you were given multiple suggestions/solutions, it is also helpful if you would list the solution that worked for you.

Once you have posted those details, when still looking at your thread, near the top of your thread you'll see Thread Tools. Click the down arrow to expand the drop down menu, at the bottom of it you'll see Mark this thread as solved. Click on it to mark your thread as solved.

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Old 26th September 2010   #15
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Forgive me for disregarding the board FAQ.

Problem solved, repair install get rid of the problem.

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