Sandeep,
The switch is not gigabit. It's a 16-port 100mb switch. The 2 computers with slowing problems actually have 4GB memory. The server has 4GB memory also. The staff reported that the 2 computers start slowing at the same time. Also these 2 computers are mainly used for the clinical part, whereas the other ones that don't slow down are more for administrative (demographics, II tabs, scheduling). Do you think it's a network issue? Maybe I should add more memory to the server?
For the other 2 that crash, I'm still monitoring to see what screen is causing the crashing.
Serene