Issue after upgrading Windows from 8.1 to 10

• The computer is running Windows 10.
• The computer’s power button and option under On/Off in Start menu is configured so that it can be used to hibernate the computer.  
• The computer enters hibernation.
• I press the power button to resume the computer from hibernation.
• The computer fires up (hard disk, fan etc.) but the screen dims, only contoures of open apps can vaguely be seen. 

Does it do the same thing in sleep mode?

No, the computer fires up in seconds with bright screen from sleep mode. I have been looking for a fix all over the internet all day today but could not find any solution. I have however realized that there are a lot of people facing similar issues after upgrading from windows 8.1 to 10. I thought Windows would have fixed bugs and issues by now, but obviously it is not the case …

You could try this:

Fast Startup - Turn On or Off in Windows 10 - Windows 10 Forums

Thanks Ztrucker, but fast startup requires that hibernate be disabled, doesn't it?

Yes, it does. The point to disabling Fast Startup is to see if it's causing the problem you are having.

You can also turn off Hibernate if you want, just enter powercfg -h off from a Elevated Command Prompt.