Windows 10: PC boots up to lock screen and turns off

When I start my laptop, a lock screen appears. Then when I press the space bar, the screen goes dark for a while and the lock screen gets back. If I click on any other button, the screen again goes dark and then the lock screen appears. I can do nothing with this because I can see just the lock screen

:)

 

PC Build Steps

Ok just because I like steps i am going to create some steps. Please give me the stamp of approval/disapproval

• Install system in case
  • Remember to connect SSD and optical to same SATA ports on motherboard
• Turn on PC
• setup HDD
• run blend test in prime95 for 30-60 min
  • run realtemp at the same time

• While in Prime95 test
  • if CPU goes above 70c in RealTemp, I have a leaky CPU
  • if my system locks up or blue screens, there is an instability in the system somewhere
  • if my system does not lock up or blue screen, my CPU is not damaged and I am in the clear!

What do you guys think??

 

PC Build Steps

1.1 - Ideally put optical in SATA 0, and SSD in SATA 1, this will cause the optical drive to be the default 1st boot option. You can change it manually if not, but I like it this way
2.infinity - yes, that's fine. if it's above 70 +/- 5 degrees, then it may just need a repaste/remount

 

PC Build Steps

With:

1. Prime95

• What do I do if the PC locks up or blue screens?

I meant:
What am I supposed to do if the PC locks up or blue screens? Turn off the PSU?