Our network is served by a Windows 2003 Server machine, using Active Directory for users security management. There are more than 60 machines connected on a daily basis and most of our files are stored on the server. Everyone worked normally everyday, until today.
Today we started having this very weird problem: all Windows 7 clients can't even ping the server properly. We have already restarted the server (a dreadful thing here) to no avail. We've checked all possible logs in the Event Viewer but had no clue as to what is happenning. We noticed that the ping behaves specifically: the first ping succeeds but the other three don't. Here's the image:
On the Windows XP machines all goes safe and sound, people accessing the shares and computers normally.