Preinstalled Windows Vista Business 32bit on a Dell Optiplex 755 DT loosing network connection after a few hours up.
A few application installed (MS Office 2003, Skype, Winamp).
No abnormal process in task manager.
Cannot ping any other host on network while other workstations including another Dell Optiplex 755 DT) are working fine.
Sometimes the connection is up after a while, sometimes I have to restart.
What could it be?