Was over a year ago and so I doubt it's that.
Now that your files are safe can you boot your W10 install and repair media? If you don't have that you can create it and NO CD KEY is required. Read https://support.microsoft.com/en-us/help/15088/windows-10-create-installation-media
Once you have that you can boot that (varies with PC so I won't write much except FAST START might have to be disabled in the BIOS and the boot drive selected to boot your W10 stick.) Now you can try the repair offered by that stick.
If that fails you can explore other recovery options like EasyRE (see google.)
-> Remember, backups are not optional as PCs are not reliable enough to go without full backups. So the first thing we safeguard are our files. Now if you work from your PC like most do, then you keep a full backup ready to restore or at least a recovery kit with the W10 install+repair media and your apps and files.
I'll try and keep this short. Computer running fine. Then video freezes on computer. I try reboot to no avail. Take out everything other than C Drive (SSD). It booted once but never again. I've seen a million articles where MS update will brick the drive and cause this. I can put the drive in an external drive holder and can view all t he files and ran chkdsk and a bunch of tests and all come out fine. Put it back in base computer and still no go. It attempts repairs but no go and it will continuously loop around over and over. I am at the point of hitting the "Reset this computer" and it will reinstall windows but then the massive amount of apps I have loaded will all have to be reloaded. I have gone it and backed up everything I could find important but you know there is always something missed. I haven't found a good solution to this yet so checking this forum. Looking for last ditch save before Windows reset. PS:I believe it is set up as UEFI as there is no bootmgr there. I did try and go back to previous version thru restore but no help.