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Windows 7: cant access root drive - lost admin rights

18 Aug 2009   #1
Ali

windows 7
 
 
cant access root drive - lost admin rights

Hi;

I installed Windows7 recently. I was changing permissions and accidently denied authenticated users to C drive. I was logged in as admin which is the only account. Now I cant access anythig in C Drive and cant execute any thing. I tried through safe mode as well but of no use. How can I regain access or reset permissions.

Any help would be appreciated!

cheers


My System SpecsSystem Spec
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18 Aug 2009   #2
septprince

Window 7 build 7600, Xp pro(VM)
 
 

Can you open the properties of your c:\ drive????
My System SpecsSystem Spec
18 Aug 2009   #3
Ali

windows 7
 
 

Yes I can but cant do anything under the security tab which requires admin rights.
I even managed to activate hidden admin account through safe mode but cant do any admin stuff using that account too.
My System SpecsSystem Spec
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18 Aug 2009   #4
septprince

Window 7 build 7600, Xp pro(VM)
 
 

You denied authenticated users access and you change it to what??
My System SpecsSystem Spec
18 Aug 2009   #5
zigzag3143

Win 8 Release candidate 8400
 
 

authenticated users= no access. that might be a slight problem If the hidden super admin cant change it I hope you have a backup to restore, or you could try a repair install

Ken
My System SpecsSystem Spec
18 Aug 2009   #6
Ali

windows 7
 
 

actually i was trying sumthing to get rid of that pop up asking to allow an exe to run thousand times a day and mistakenly denied to all.
Now I cant even retore as it doesnt open the restore window due to access problem. Looks like I am gonna give up and try ro repair/reinstall(

cheers
My System SpecsSystem Spec
18 Aug 2009   #7
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by Ali View Post
actually i was trying sumthing to get rid of that pop up asking to allow an exe to run thousand times a day and mistakenly denied to all.
Now I cant even retore as it doesnt open the restore window due to access problem. Looks like I am gonna give up and try ro repair/reinstall(

cheers
Ali

Its actually your best idea. btw that annoying pop-up is called UAC and you can turn it off.

Ken
My System SpecsSystem Spec
18 Aug 2009   #8
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

You could give this a try first:

1 Go into Safe mode with cmd prompt

2. Open cmd prompt and type:

NET USER ADMINISTRATOR /active:yes {enter}

3. Type NET STOP ProfSvc {enter} to get to login screen.

3. Ctrl +Alt+ Del > start Task Manager> New Task>Explorer.

4.EITHER :

a) Open Regedit and go to

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System.

In the right pane , rt click and Modify EnableUA and change the value to 0.

warning   Warning
Use this only in Windows 7. Disabling UAC like this in Windows 8 will break Store apps, and cause you to no longer be able to open and run them.



-rgedit-1-2009-08-18_175442.jpg

OR

b) Go to Msconfig>Tools Tab>Disable UAC.

5. Then rt click C drive Properties >Security>Highlight Authenticated Users>Edit >Tick Full Control>Apply>OK. and see if you can get control of it.

Name:  AUTHENTICATED USERS -2009-08-18_180305.jpg
Views: 148
Size:  76.6 KB


My System SpecsSystem Spec
18 Aug 2009   #9
Antman

 

Ali, based on the evidence presented, I cannot be alone in providing a singular bit of advice - you may be well served to leave UAC enabled, at least at a minimal level.

After the successful repair or re-install is accomplished.
My System SpecsSystem Spec
18 Aug 2009   #10
Ali

windows 7
 
 

Thanx SIW2... I disabled UAC and now I get the following message when I click security tab of the drive : "You dont hav permisssions to view or edit this object's permission settings".

I think, the only thing that could help is by changing the permissions from registry but dont know how to do that
My System SpecsSystem Spec
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 cant access root drive - lost admin rights




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