black screen Ctrl+Alt+Del

[woofwoofbark]

Windows 10 all updates installed
4770K
Asus 7970 top 3 GB
16GB ddr 3
SSD Evo 250gb for windows and a few games with around 90GB free space
HDD 1TB

A few times recently my computer didnt boot into windows..

A few times it booted to black screen with 'ctrl+alt+del restart'..
No other info was on screen..

I hit the keys and the system restarted and booted into the desktop..
There was one time when I did this and it returned to the black screen with ctrl+alt+del restart , but the restart again then booted into windows
This has heppened a few times over the last 2 or 3 weeks

One other time windows was about to boot as it shows the blue window and then the spinning dots just prior to booting into windows... well the blue windows stuck on screen for a few mins and i had to to a hard reset of the desktop and it restarted into desktop

One time before booting into windows I got a message saying scanning C for errors but it was only on screen briefly before windows desktop opened.

I ran right click on C drive >properties> Check >Error Checking on C... but it didnt find any errors..

What could the problem be ?
Any advice is welcome.. thanks

 

[woofwoofbark]

Anyone know of a solution or have advice ?

Thanks