Back in my MSP days I had a client report that their server was slowing down after an hour. They would also use this "server" (a tower computer in a back room) to adjust inventory, print reports, etc, but after an hour of having used it, everything would slow to a crawl. It was running databases and such that other computers in the building accessed.
Every time the server slowed down, someone would go back there and restart the software, or reboot the whole computer, and it'd be fine for another hour.
Sure enough, after an hour, some fancy ass 3D screen saver came on and pegged the CPU. It was some shareware thing that someone downloaded because it looked cool. I ended up turning the screensaver off and just set the monitor to go to sleep after 10 minutes.
Every time the server slowed down, someone would go back there and restart the software, or reboot the whole computer, and it'd be fine for another hour.
Sure enough, after an hour, some fancy ass 3D screen saver came on and pegged the CPU. It was some shareware thing that someone downloaded because it looked cool. I ended up turning the screensaver off and just set the monitor to go to sleep after 10 minutes.