Domain Issues-Computers Seem to drop "off" the domain

view full story

http://serverfault.com – I am having a issue with the domain at work (P.S I am not an IT prof.) and I was hoping someone could help me debug what is happening or point me in the direction of where to look. The whole thing comes down to the fact that some of the Computers seem to be "dropping" off the domain. But its strange because I can still log in as domain\UserName from the computer, but when I look at the Networking And Sharing Center it doesn't show the domain, it just sees a network, and programs that use to run fine suddenly get timeout errors. As well it has been happening in such a way that first one comput (HowTos)