Win Xp freezing / Cannot start service

Hi,
This is my first time posting on these forums.I have been expierencing this problem for the last while. It can occur at any time put usually while playing games.
My pc will freeze completely and i need to restart it. Looking at the event viewer shows the same errors everytime



http://i40.tinypic.com/iokbde.jpg



The error information is the exct same with only the services varying

they are-
The Microsoft Monitor service
The Server Config service (x2)
The Monitor Installer service
The Center Image service
The Server Microsoft service

With the error text reading-

Code:

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7023
Date:        16/06/2009
Time:        22:41:31
User:        N/A
Computer:    NEW
Description:
The Microsoft Monitor service terminated with the following error:
Access is denied.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

I tried to manually start the mentioned services and i cant. I get an error 5: access denied

This is the message that appears in event log-

Code:

Event Type:    Error
Event Source:    Service Control Manager
Event Category:    None
Event ID:    7028
Date:        17/06/2009
Time:        02:34:14
User:        N/A
Computer:    NEW
Description:
The bjypes Registry key denied access to SYSTEM account programs so the Service Control Manager took ownership of the Registry key.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

I am logged in as administrator and i have full control on the account, but it will not let me start or even edit the properties of these services.

I really need to solve this issue. If any more information is needed plz ask me.

Regards,
Dan.