An XP pro system joined to a domain, appears to login with the cached user credentials, can access the Exchange server and the internet, but cannot access the MS network. in services found the workstation service would not start, and the net logon service wuld also not start. I have removed the networking components, removed the NIC, reinstalled all - no success. I have removed all XP and explorer patches, no success, then installed XP SP 1a no success. Any Suggestions? If not I am going to lose a day wiping out the OS and starting over...all those applications and downloaded patches.