Microsoft Window network: FREEZING

Hi,

1) This is in the Enterprise Network environment (around 80 % are windows environment) (and the rests are Linux, unix and few macintosh)

2) a month ago, The network was freezed ...
- Nobody could not login anymore to the network (when they tried to login to their XP workstation......It seems it is logging in ....but all the icons disappeared ...and they totally could not login at all ......waited for more than 30 minutes were still the same ...etc
- But whoever has been logging in are OK; they can still do their jobs (normal only slower activities)

3) The consultant checked the File server
- Right-click My computer > select Manage ....then go to the Sharing ...
- It was seen that only one person at that time used around 300 files ....
- The consultant rebooted the file server, and everything back to normal again

4) My questions:
First: What does the CAUSE of this problem?
Second: Could the company UPGRADE something to avoid this situation? (It is "scarry"; one person could let an enterprise network "freezing" like this)
Third: Should the company do ROUTINE (maybe once a week) maintenance to avoid this situation? If yes: What is it?

5) Thanks

tjie
tjieAsked:
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Jon WinterburnConnect With a Mentor Commented:
One person accessing 300 files on the share?!  That would immediately ring alarm bells for me, and my first port of call would be to locate that user, physically disconnect them from the network and analyse what they were accessing and why.  Reason being, this would make me think of a virus infection.  Same thing for the network freezing - no decent network should completely freeze like that, even when in busy operational use.  Sounds like it was bogged down with too much data flowing through it - much more than just an enterprise using it day-to-day.  Again, I would be very suspicious.  Do you run anti-virus software on all clients and servers?  You could also use packet sniffing software like WireShark to see what traffic is traversing the network.
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tjieAuthor Commented:
The recommendation partly solves the problem
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