If you're going to start playing around with multiple OS's. Is really in your best interest to start using a data partition. Or better yet, start keeping your files somewhere else entirely and then backing that place up...
You can't really brick a PC by doing anything to the boot drive though. You may screw up the OS, but the bios is there to make sure you can boot off something else if need be...
I fell down the internet rabbit hole. He gets 1.2M in pay. No bonus and no stock award. The rest are options. Last year he has sold 400,000 shares worth $69M. The year before he sold 1,950,000 shares worth $690M... Looks like he had a scheduled sale of 80,000 shares every 2 weeks. Which had been worth about $25M every time. It looks like he stopped it when the same sale started pulling in about $11M. So yeah, assuming a generous $500k fully loaded employee cost, they cut $150M in HC. So canning him would save about 40 jobs. And he'd still be a billionaire.