Laptop shuts down instead of going into sleep mode when I send it to sleep

I'm using an Asus laptop. It's more than a year old. This has been going on for maybe a month. I've looked into all the basic settings but can't find what's causing the problem. Here are the settings:

And I also tried changing what the power button does when on battery power to see if that will work, but the computer still refuses to go into sleep mode and instead shuts down when I press the power button - and I should add that the 45 minute rule is followed on batter power also, but only with the variation that the laptop is shut down, and not sent to sleep:

Solution 1:

The first problem that needs solving is that chkdsk never finishes. Once the disk is verified, it is possible to check the integrity of Windows using sfc /scannow.

You may try to leave chkdsk running overnight, but if this never finishes, try to see if one of the following tools can find the error :

• EaseUS Partition Master Free doing disk surface test
• HD Tune doing Error scan
• Macroit Free Disk Scanner