Windows 7 Professional to Windows 7 Home Premium?

I have a laptop with Windows 7 Home Premium (64-bit) installed and am planning on upgrading it to Windows 7 Professional (64-bit).

I would like to know if it is possible, however, to revert back to Windows 7 Home Premium (64-bit) once I have installed Windows 7 Professional (64-bit)?

2 Answers

No, you won't be able to, you'd have to do a clean install. Can't think why you'd want to go back though, Professional only adds features.

Hi I fine this on another site:

"here is a “simple” hack which allows you to embed the downgrade procedure in Windows 7.

Click Start. In the Search Box, type regedit and press Enter. Navigate to this registry key: HKEY_LOCAL_MACHINE\Software\ Microsoft\ Windows NT\CurrentVersion

In the right pane, click EditionID and ProductName and give them the value which corresponds to a lower Windows 7 edition. Here is an example:

Windows 7 Home Premium (downgrade from Windows 7 Ultimate to Windows 7 Home Premium)

EditionID: HomePremium

ProductName: Windows 7 HomePremium

Start your Windows 7 installation by inserting your Windows 7 Disc. Now, Select Upgrade as type of installation. Follow the instruction on the screen. Reactivate your operating system. "

Attention: Text "HomeEdition" and "HomePremium" must be without spaces!!!