fiber optic roblems

A couple months ago, about 3 or 4, I changed my internet provider, greater download speed and greater upload. But I started to notice something was wrong, It started happening once every two days, but today It started after 15 seconds into a video. My internet just drops while watching a video...

I need some suggestions on what to do. My computer isn't booting up at all. I'll give as much information as possible. PC specs: ( https://pcpartpicker.com/list/bjVXD3?fbclid=IwAR1i4CSrW7LJpsGHI95wW-rZiByj1BjYHUu1cPpn0GqD0p3mJo0OTeFV_Jk ) It's running windows 10 and has 4 cooling fans also. I...