How can I suddenly lose my admin rights?

[Xamarth]

Basically I cannot access my Folder Options via the Tools tab. All I get now is 3 options about Synchronizing and Network Drives but I used to always be able to reach my Folder Options.

I got some help from Yahoo that said to Run "regedit" but I cannot because it says I don't have the rights to, only the Administrator. I tried hitting Ctrl+Alt+Del to bring up Task Manager but it says it has been disabled by my Administrator.

Now... I'm the only one who uses this PC. I don't have multiple accounts on it, only the main one I've been using for years now that doesn't even require logging on, it just opens automatically. I haven't changed any settings lately at all. I have no *censored* idea how this came to be. Please, I really need to get rid of this problem.

[Allan]

Add TAKE OWNERSHIP to your context menu as a first step: http://www.howtogeek.com/howto/windows-vista/add-take-ownership-to-explorer-right-click-menu-in-vista/

[Geek-9pm]

Reboot in safe mode. (Hit F8 key.)
You can log in as Administrator.
The password is whatever you set, or blank.

[Allan]

As a long term solution, you can run the powerful subinacl utility

Download: http://www.microsoft.com/downloads/details.aspx?FamilyID=E8BA3E56-D8FE-4A91-93CF-ED6985E3927B&displaylang=en

Usage: http://articles.techrepublic.com.com/5100-10878_11-1051004.html

[Xamarth]

This isn't helping. I did the Safe Mode route and when I was on in safe mode everything worked like before but now back in normal mode the problem is still there.