Windows restarting

You haven't provided much information.

Are there any common elements between all the machines that you can recognize. Are they all the same hardware? Do they all have the same software? Does the same cleaning lady clean all 11 locations and unplug them at night?

When did the restarting begin? Has it been since they were fist installed, or have any changes happened since then that has caused this situation?

If they fine over the winter and then now that it is getting warmer you are having problems, then I would guess that it is heat related.

If nothing here gives you an idea, then please provide some background information about the machines and the situation.

I definently agree with the previous response you have to give more information than that....

Are the computers sitting on the floor?
Anything it could be any number of things. To Hard to tell with just this information

It sounds like your having problems with power management. Do these machines go into standby/hibernation, and then when they wake up they restart?
If so goto control panel power and their will be a box that enables hibernation uncheck it.

Hi,

Besides other things already mentioned by other members, you need to check the CMOS settings. You may have the CMOS option to restart the computer upon failure. Your system may experienced system failure, core dumped, and reboot. Check forexistence of dump files. Turn on DRWATSON.

It could also be your CMOS settings. Your CMOS may have enabled the AC Power Loss Restart.

Another possibility, althought remote, is that you may have wake on LAN (WOL) enabled and perhaps along with Power Management on your NIC set to "Allow the computer to turn off this device to save power" AND/OR "Allow this device to bring the computer out of standby". Check and re-evaluate the consequences of any Power Management hardware setting you have on each PC from the CMOS to the NIC, along with softrware-based setting on the OS and apps (screen savers, etc).

Regards,

Confucius