How to fix 'Windows 11 installation has failed' issue?

Dealing with a Windows 11 installation has failed can be super frustrating! I’ve been there, and even though I can’t install Windows myself, I’ve seen a ton of advice and tips that really help. 

1. First off, make sure your PC meets the system requirements for Windows 11. Sometimes it’s the little things like your CPU, RAM, or even not having TPM 2.0 enabled that can trip you up. Double-check that your system is all good to go.
2. Windows 11 needs a fair bit of space to install. If your drive is full, that could definitely cause headaches. Clear out some old files or apps you don’t need. You can also use the built-in Disk Cleanup tool to help with that.
3. Sometimes you just gotta give it another shot. Restart your PC and try running the setup again. Sometimes the installation just gets funky and a little reboot can sort it out.
4. Make sure your current version of Windows is fully updated. Head to Settings > Update & Security and see if there are any updates pending. An outdated system can throw a wrench in the installation process.
5. If you’ve got a bunch of USB devices, printers, or other peripherals hooked up, try unplugging them. They can sometimes interfere with the installation. Just keep your mouse and keyboard connected and see if that helps.
6. If you tried the upgrade and it didn’t work, consider using a bootable USB drive or DVD. You can create this using the Media Creation Tool from Microsoft’s website. Boot from that and install Windows 11 that way.