New error Please HELP ME

All of a sudden I get this

Event Type: Error
Event Source: NETLOGON
Event Category: None
Event ID: 5719
Date: 1/12/2010
Time: 11:45:33 PM
User: N/A
Computer: TGKW001
Description:
No Domain Controller is available for domain OUR due to the following:
There are currently no logon servers available to service the logon request.
..
Make sure that the computer is connected to the network and try again. If
the problem persists, please contact your domain administrator.

For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 5e 00 00 c0 ^..À


but I logon and can access the network drives and servers

What is wrong ?

I am at wits end

I removed my antivirus program still getting this


Confused


Tom