Unable to have administration rights

[Kafhir]

Ok guys, on my pc there are 4 accounts (all the family) with administration
rights in order to give all freedoom and possibility. But about 2 weeks ago
all of us lost administrative rights.
What appen is wery simple. On control panel if you try to open pc managment
(compmgmt.msc) or policies (secpol.msc) a message pop-up "Access denied".
If I try to run as Administrator nothing appen.
Task that I allready have done:
turn on and off UAC
restore default administrative rights
delete user accounts and create new one
use the "hidden" administrator user
nothing change.
I own vista business and the pc is clear from virus, spyware etc etc (thanks
nod32)
Thanks in advance from suggestion and hints

 

[jamesvdm]

Have you changed any services recently? Check to see if the Secondary Login
service is running.

James

 

[Kafhir]

I try to do that but unfortunately also this possibility was not successfull.
I'm thinking about the possibility to restart the system in safe mode and
try to change system policy setting.
However there is no guide about registry setting for policy and UACor at
least I dont find it

 

[jihchiang]

Hi Kafhir. You know and I know and everyone knows that amongst all the
accounts in the computer, one of them HAS to be an Administrator. That's a
fact. Now the conjecture. If none of you has the adm. rights anymore, that
means either someone has hacked into your computer, or there is a 5th acct.
and it's the ADM. Might not be as crazy as it sounds.

 

[jihchiang]

YES! I just remembered. Re-start your computer in Safe mode. Go to Control
Panel and start a system restore- ( yes, I know. You will be asked for adm's
permission or password. Just do it as usual, it will let you in ). After
that just pick a date as far back as the list allows and do the system
restore. After that you should be back to normal.Let me know if this works.
It worked for me last time , it wouldn't allow my login password and that's
what I did to have my laptop back.