Windows 10 will let you reinstall the OS from the cloud

The company stressed that this will wipe your existing apps, and your data you choose “remove everything.” And remember, this is pre-release software. You’ll likely want to wait until there’s a polished version before trusting the fate of your PC to the cloud option. When it does arrive, though, it could offer a valuable failsafe if Windows is falling apart and you want a more reliable fix.