Are you using static IP for the devices?
Open this link Setting a Static IP Address in Windows 7 - PortForward.com
and follow the instructions from step 5.
If at step 9 you see something similar to the picture. choose "obtain IP automatically"
did this help?
About the problem with Chrome. i have no idea.
If non of the other guys have an idea, then check out chromium.
I find it better. You get updates quicker (by the cost of slightly less stability (you get beta updates)) you have less change of getting browser hijacks (this helps if you are that kind of guy that forget to uncheck things free apps recommend you install. where i work i have installed chromium on some of the students computers for this reason) it might also fix your problem.