TechQuest

Your PC spec?

How old is your PC

There's no internet connection when the lights are off. Do you mean reset the router configuration?

My router DSL and the internet light sometimes will spontaneously gone. Someone can help me to solve this problem?The first picture shows the router in normal state. The second picture show the modem in problematic state.

Nope, there is the build 1507/10240 on the list.

Yup

Do you made any system restore checkpoint?

Switch the boot priority to the bootable os disc

Since you can't boot your pc, try boot into the system disc and fix the partition

Use winver command

What Windows build do you use?(Example Version 1703 Build 15063)

I think this build is probably OK for you. Hope you like it. https://ca.pcpartpicker.com/list/97NysJ

I think is probably the OS bug.