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

Can you open the properties of your c:\ drive????

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.

You denied authenticated users access and you change it to what??

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

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

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.





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.

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.

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