Upgrade Types
In-Place
Keeping all your files and just changing the OS version. Done with Windows Updates
Clean-Install
Removing all files and installing straight from a bootable drive. Done with Windows Media Creation Tool
Upgrade Restrictions
- You cannot upgrade to x64 or x86 OSes if your CPU does not support the model
- Cannot in-place upgrade in Windows 8. You must install Windows 8.1 first.