on the computers at my school you can't use task manager. it really sucks in engineering because sometimes the program we use for modeling crashes and you can't tab out to another window so you just have to restart.
our web filter is godawful though. i can't access my image hosting site because it's listed as "spyware/malware" and i can't do a lot of research on things like video games because it blocks everything that mentions gaming. also, they blocked youtube because it was "slowing down the internet at the elementary schools." that really sucks because a lot of the teachers have youtube stuff that they want to show us as a part of their lessons but it's blocked.
Solution: VPN/proxy.
At my school they block all programs under "Accessories" (like snipping tool, paint, sound recorder, calculator, etc.). However, you can go to the C:\Windows\System32\ folder and it works.
But the IT guys somehow forgot to ban Windows Powershell! It's like command prompt except has more commands. Plus, you can
evade all blocks by simply starting up Teamviewer and remote-desktoping to your home computer. How nice is that??