Access Problems to AD, Exchange, Event Viewer

We have a two domain controller, one domain system.

It has been working fine.

All of a sudden, when I try to see the event viewer, Applications...I get:
"Unable to complete the operation on 'Application'.  Access is denied"
The only one I can open is Security.

In trying to open Exchange System Manager, I get:
Access is Denied
Facility: Win32
ID no: c0070005
Exchange System Manager

In AD...which can open:
If I try to look at the properties of an account I get:
Access is Denied
Facility: Win32
ID no: c0070005
Microsoft Active Directory - Exchange Extension

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George SasIT EngineerCommented:
Things don't happen suddenly .... remember what was the last change you did to your AD ?
Do you ahve only those 2 domain controllers or more ?
glenn_1984Author Commented:
Only two.
The only change I made was to remove the system login account from Veritas Backup Exec on the other server.

System Login Account still controls Backup Exec on this server and as most Services.  Everything works.
glenn_1984Author Commented:
Problem Solved.

Some idiot (whoops, that's me) put the Guest account in the Administrators Security Group.

Solution is to download and install the adminpak to another PC, so you can remove the Guest from Administrators Security Group.

Log off and log on ....problem solved.
George SasIT EngineerCommented:
Cheers :)
PAQed with points refunded (500)

EE Admin

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Windows Server 2003

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