System Restore tab is missing on all of our computers in our network (Windows XPsp2 computers on Windows Server 2003sp1 network). Ive gone through all the articles and nothing seems to fix the issue in restoring it or what happened to it

I followed the troubleshooting tips from this link to no avail.

http://www.softwaretipsandtricks.com/forum/windows-xp/17333-system-restore-tab-missing-xp-pro.html

I am equivalent to domain admin with administrator privileges.  It is not a domain policy issue (local or Global)- Ive checked them.  The system restore service is running.  Ive gone through the registry to check the following:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\
SystemRestore.
If a "DisableSR" value doesn't exist, go to the Edit menu, select New, DWORD value, and create the value.
Set the value to 1 to disable System Restore or 0 to enable System Restore.
The DisableSR value is set to 0

In my case, SystemRestore wasnt even there, so I created it and created the DisableSR key.  Rebooted, nothing.  Some articles stated to delete the DisableSR key, which I have also done to no avail.

I followed article Microsoft 304449 on how to start the system restore tool at a command prompt in Win XP by typing the following command %systemroot%\system32\restore\rstrui.exe

But I get the following message:
System Restore  you do not have sufficient security privileges to restore your system.  Please contact your administrator or logout and log in again as an administrator and try again.

To amuse myself, I even logged in as domain admin and received the same message.

I followed Microsoft article 302796:
No system updates are needed
I checked and confirmed that the service running and even ran net start system restore service
I attempted to check the Service Event log for system restore error (sr or srservice) however, I receive the following event viewer error on Security:
Unable to complete the operation on Security A required privilege is not held by the client??  I had another IT user who is domain admin equivalent with admin privileges and he receives the same thing.
I booted in safe mode and tried running the system restore tool but received a security message that I dont have sufficient security privileges to restore the system.

I followed article 283252. To amuse myself, I rechecked my local policy and global policy for these permissions:

"      Manage auditing and security log
"      Take ownership of files or other objects
"      Shut down the system
"      Back up files and directories
"      Restore files and directories

Again its not a policy issue, however, I even granted them to myself, administrator, and everyone  did not make a difference

I ran esentutl /g %windir%\Security\Database\Secedit.sdb and received an integrity check successful

Weve disabled McAfee from startup, so its not AVP.

Ive logged into the computer instead of the domain with administrator privileges and the system restore tab is still missing.

Any thoughts or what else to check for on this problem we are having?  We're concerned about receiving some of the security privileges messages as well.

Thanks,
Vicky
helpdesk@lmtproducts.com