In my office system are getting slow all are in domain?

Answer 1

I agree with Christopher's answer. Think of it this way, every machine that gets added takes another slice of the pie.

The more computers the smaller each slice becomes until such a point that there is simply no pie left to slice and everyone gets very tiny pieces!

Only fix is to get a larger pie. (called more bandwidth)

This can also be caused by virus or worm which uses up bandwidth.. Just thought I would add that.

Answer 2

simple to much "TRAFFIC"....