What to do if Windows keeps getting corrupted?

For the second time now, my PC has just randomly not been able to boot and got stuck in an automatic repair loop. The error code I get when trying to boot is 0xc000021a. I've tried everything and it seems the only solution is to reinstall Windows in order to be able to turn on my computer again.

This is incredibly frustrating because I lose all my programs and files each time.

What is the issue? Could it be my SSD? I bought it only a couple of years ago!

I have no idea what could be going wrong? I couldn't find much online on this problem.

Edit: After doing some more research online, could it be that my SSD is failing? (but it is only 1-2 years old?!!)

After reading a little bit on the internet I found this page,

http://answers.microsoft.com/en-us/windows/forum/windows_8-update/windows-8-pro-cannot-boot-error-0xc000021a/ebf26ca7-e594-4c56-bbe0-cca43dfe5978

Where a guy says

i had this problem and i fixed it. i faced this after updating my win8 and rebooting after that update. i tried safe mode but it failed to boot. finally i tried to boot with "force drivers to have signature disabled" and it worked.

Don't know if this will help you but its worth a try! It's marked as best answer over there so it helped some people!