Can't access or change User Accounts or Permissions - VIsta Business

About a year ago I installed a new Dell PC with Vista Business and Office 2007.  When Word crashed I spent several days working with Microsoft support to get the system to work.  While Microsoft were able to get me up and running, the C;\ root showed the operating system folders even though the folder options are correctly set to the default which should not show hidden files and folders and should hide protected operating system files.

Yesterday, this idiot tried, without success,  to change settings to hide the first of the folders. I don't know what I did but now:  I think that the folder I tried to change was 2ffb159015146d40fb70e56ef37df5b

1. LiveOne Care has stopped working.  
2. Vista warns that the Firewall is not on.  As LiveOne Care isn't working, it's firewall can't be turned on.  When I try to turn on the Windows firewall, the system says that the program won't run as access is denied.
3. Backup and Restore Center won't allow back saying:  access denied 0x80070005
4. When I try clicking on  repair Windows using System Restore, the system doesn't do anything.
5. When I gGo to Control Panel/User Accounts anc click on Change your account name, Change your account type, Manage anothe account or Turn User Account Control on or off, nothing happens.
6.  When I tried to uninstall LiveOneCare, I got a message "You do not have sufficient access to uninstall Windows LiveOneCare.  Please contatct your system administrator.

All applicaitons (e.g. Outlook, Excel, Word, Acrobat, Explorer) seem to be working without problems.

I'd appreciate help to:
1.  Get the system back working that way it used to and should.
2.  While I can (and did) live with seeing the system folders, it would be nice if there is some simple steps I can take to hide them.

Thanks.


socheriAsked:
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socheriConnect With a Mentor Author Commented:
Had to reinstall Vista.
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MotoCrazyCommented:
I wish I could help you restore your system, but to hide the files and folders, open command prompt.

To hide a system folder or file:
attrib +h +s foldername
attrib +h +s filename.ext

You can try sfc /scannow and see if that does anything for you. From command prompt:
sfc[space]/scannow
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socheriAuthor Commented:
Unfortunately, when I run command, it won't let me run anything because "You must be an administrator".
If I try to run command as administrator it says "Windows cannot access the specified device, path, or file.  You may not have the appropriate permissions to access them."

So, I guess I'll have to wait and see if anybody can help me fix the system problem and then try your suggestions.

Many thanks.
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socheriAuthor Commented:
I've upped the point value.
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socheriAuthor Commented:
The problem proved to be insoluble.
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Vee_ModCommented:
Closed, 500 points refunded.
Vee_Mod
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