Windows critical processes

Hello

I have recently been exploring the different processes that are running on my computer using a program called Process Hacker which lists every process that is currently running including the ones that are usually hidden by default. A few days ago, I mistakenly ended a process called csrss.exe, which caused my computer to crash and take me to the " Your PC ran into a problem and needs to restart" screen. Upon rebooting the computer everything was back to normal and running as it should be, but this got me thinking. With Process Hacker you can select more than 1 process and terminate them at the same time, so what would happen if I were to select every process currently running on my computer and terminate them all at the same time? If I were to guess I would say that this would not go down too well, since there is a process running called "CrashHandler", which tells the computer what to do next after crashing and i'm guessing that taking away the computer's ability to run the crash handler would turn my computer into an expensive paperweight maybe?

I would l love to read some opinions on this from people that know more about this stuff than I do.

Any information would be greatly appreciated.

Thanks

John