This. I installed ublock on my grandpa's computer because he called a day after I sent him a new one to tell me it wasn't working right. In just one day he had

This. I installed ublock on my grandpa's computer because he called a day after I sent him a new one to tell me it wasn't working right. In just one day he had loaded it up with malware. I installed ublock, installed a bunch of additional filters, and there's been no problem since.