Windows 10: Why wont my computer let me log in?

Hi, so I have bin having this issue where everytime i try to log in or click anything my computer screen would just flash. Since it wont let me click on anything im currently stuck on the log in screen and eveytime i try to open the enter password tab it would just flash and return back to the wallpaper screen.

:)

 

PC wont boot up (No POST, No Video)

Aren't we being a little harsh? I know I can't be the only other person on this forum to have skipped checking the official memory compatibility list when building a computer. Had I been in the same situation and followed the same steps I would have thought I got a bum board too, regardless of whether or not the memory was on that list.

 

My hp laptop wont turn on

This is a frequent problem am sure as you have already seen from online searches.

Flea power is usually the culprit here, basically its residual power that remains on the computer even after thecomputer has been shutdown. You can drain the flea power with the steps the other answers have suggested.

• Disconnecting the battery and adapter
• Press the hardpress the power button for 30 seconds
• This should clear the flea power

If this doesnt work, read this article its about
a dell inspiron but the same applies for you hp. It has some detailed step by step instructions

 

Black Screen after Log on


Computer boots to windows log on,have no password here.After a minute on log on it go to a black screen,stays there forever. I can get to Task Manager from black Screen,lost on what to do next. Just want my Windows 10 back, not sure what caused this problem. Any Suggestion on what my next step should be?*Sad