Update Issues on a 2003 Server

One of our 2003 servers stopped updating from the internal update server. I have tried to clear the update cache and re run the update with no luck. Is there a way to get it to update?
With our users in the field, all i tell them to do is reboot and it fixes it all the time.

I prefer no reboots or reinstalls if possible, this is our very populated Terminal server.

 

how do you update user from server ?.

using share folder or RA

 

delete the contentes of the mirror folder and try to run the update from console

 

Remote Admin server

 

Is that on the RA server? I dont have access to the RA server, my manager does. Do it from that console or the console of our terminal server?