For Windows 7 Clean Installation, please refer to these resources below on how to perform Windows 7 Clean Installation.
To download the Windows 7 Professional ISO file, go here.
For Windows 8.1 Clean Installation, please refer to these resources below on how to perform Windows 7 Clean Installation.
To download the Windows 8 Professional ISO file, go here.
REMINDERS:
- If you have upgraded from a Windows 7 or 8.1 OS to Windows 10, but your original OS in your computer is either a Windows 7 or 8.1. The system will roll back to the original OS
- If you want to roll back your system to the previous OS, 31 days after installing Windows 10 you will not be able to perform the rollback.
- If you perform a Clean install while loading Windows 10, the option to roll back will not be possible.