Hi, I am Dave, I will help you with this.
Are you able to get into Windows?
1
If you are unable to get into Windows:
Are you able to access the recovery environment using these steps?
Start your PC, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down
Do this twice
On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt... etc.
2
If you can get into WIndows:
Please check to see if your PC is producing any minidump files, I will check those to see if they provide any insight into a potential cause of the system crashes.
Open Windows File Explorer.
Navigate to C:\Windows\Minidump
Copy any minidump files onto your Desktop, then zip those up.
Upload the zip file to the Cloud (OneDrive, DropBox... etc.), then choose to share those and get a share link.
Then post the link here to the zip file, so we can take a look for you.