Hi,
First advice is to understand why it crashes...
Does it happen at night ?
Try to unplug one by one each PC, one everyday, and you will see which make it crash.
Then let us know the configuration on your PC and on the switch configuration.
Toptools was made for these switch, I do not know any better program for them... (and I am not paid by HP !)
Let us know if explanations are not clear for you.
J