Whenever i play Yorick my computer crashes. I tested it in a custom, once I hit level 7 my computer crashed and i had to restart it. A friend of mine tested it as well, and Yoricks caused his router to disconnect and crash several times.
To reproduce it, go into a custom as Yorick and just play like normal. This has a 4/4 reproduction rate for me.
_A champion or any aspect of League for that matter is unable to crash one's router. _
As for your crashing your computer, this is strange.
It's possible that you need to complete a clean reinstallation of League in order to resolve the issue. Grab Riot's Hextech Repair Tool and check both the box for 'Reinstall' and 'Clean Uninstall', then hit the Start button. This will wipe all files associated with League to ensure corruption doesn't carry over, then reinstalls the game.
Let us know if your issue is resolved or not.
(Credits to Targon's Blade for the last step)
