Windows 10: my PC shutdowns randomly and i don't know when it just turns off

So I got this problem for 2 weeks and I'm doing my work and so on. My PC shutdowns randomly and it prevents me so much from doing my work. Can someone explain how I can fix it?

:)

 

Pc problem, randomly doesn't turn on sometimes.

"
Fast startup is a feature in Windows that helps your computer start faster. You can use the following steps to enable or disable fast startup.

• Type Control Panel in the search box.
• Click Control Panel.
• Click Power Options.
• Click Choose what the power buttons do.
• Click Change settings that are currently unavailable.
• Scroll down to Shutdown settings and uncheck Turn on fast startup.
• Click Save changes."

 

Pc problem, randomly doesn't turn on sometimes.

I turned it off i'll report back if problem still persists. Do you guys have any other ideas as well, just in case this doesn't work..


EDIT: sorry for double post

 

PC is Suffering Unexpected Shutdowns

So its been almost two weeks since i last posted and since my PC has shutdown unexpectedly... My original plan was to play around with the RAM to see if that was the issue but after a few days of no shutdowns i figured i would see if the CMOS clear and repairing the corrupt OS had fixed the issue. As i already said its been almost 2 weeks since i first made theses changes and i was fairly certain it had fixed the issue...Unfortunately my PC did shutdown unexpectedly today while i was at work. It seems pretty ridiculous to me that the PC could be on for almost 2 weeks straight and have no issues then just randomly shutdown...I ran the SFC scan to make sure nothing had gone wrong with the OS and it reported no issues. My next step i guess would be to try and eliminate the RAM as the issue but honestly i find i very hard to believe that's the issue after the PC was on for 2 weeks. Surely if this was a hardware issue i would have more regular shutdowns...or at least shutdown while im actually using the PC...What do you guys think?