Windows 10 keeps crashing

Your question is too vague for anyone to offer advice. What make/model computer? What type of error? When does it crash? Can you do anything with the computer? Have you attempted to boot into Safe Mode? Try again and no need to post the same question multiple times.

I'd start with the trouble shooter Microsoft provides: https://support.microsoft.com/en-us/windows/windows-update-troubleshooter-19bc41ca-ad72-ae67-af3c-89ce169755dd
That article contains 2 other links that might be useful.

If no luck, my next step would be to download the latest Windows 10 install iso, mount it and run setup.exe from it.

If still no luck, I'd go for a clean install of Windows by booting from the installation media you can make in stead of making the .iso-file on your hard disk.