How do I repair corrupted system files after upgrading to Windows 10?

I went through the exact same worst case scenario last year. I did a Windows upgrade, everything seemed fine, and then—boom—total system file corruption. I couldn't even get past the loading screen, and I honestly thought I’d lost every single photo and work project on my drive. It’s a terrifying feeling.

Before you do anything else, try the standard revive commands. Open your Command Prompt (as Admin) and run sfc /scannow. If that doesn't bite, try the DISM command (DISM /Online /Cleanup-Image /RestoreHealth).When my system was too far gone for Windows to fix itself, I stopped messing with the OS and focused on saving my files first. I used Stellar Data Recovery and it was a total lifesaver. It managed to dig through the corrupted mess and pull my data out when I thought it was gone for good.If you're worried about your files, don’t keep stress-testing the system. Just run a scan with Stellar's free version first to see what's still alive.