TFSREPORTS Service Account Does Not Have The Necessary User Right Log On As A Service.

Okay now this is weird, today the Reporting Services was not running and here are the entries in the event log:


Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7041
Date: 12/12/2007
Time: 9:47:22
User: N/A
Computer: TFS
Description:
The ReportServer service was unable to log on as DOMAINTFSREPORTS with the currently configured password due to the following error:
Logon failure: the user has not been granted the requested logon type at this computer.

Service: ReportServer
Domain and account: DOMAINTFSREPORTS

This service account does not have the necessary user right "Log on as a service."

User Action

Assign "Log on as a service" to the service account on this computer. You can use Local Security Settings (Secpol.msc) to do this. If this computer is a node in a cluster, check that this user right is assigned to the Cluster service account on all nodes in the cluster.

If you have already assigned this user right to the service account, and the user right appears to be removed, a Group Policy object associated with this node might be removing the right. Check with your domain administrator to find out if this is happening.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp

I am the administrator of the machines and I can assure you that no domain policy has changed for a couple of weeks. What should I look for?