How to change 64 bit windows 7 to 32 bit?

I have a Windows 7 64-bit OS but i wat to change the OS to 32-bit. How can i change that?

^^^What nikorr said. Format and install with the 32-bit disc.

Can't be done, once you install a 64-bit edition of Windows the only way to switch to a 32-bit edition is to make a clean install using a 32-bit edition installation disk. If you need to run a 32-bit application that won't run on Windows 7 64-bit I think you should try to figure it out using the compatibility options within Windows first or try installing Windows XP Mode ( more info here). If you need it for compatibility with your hardware... well, I think you should really consider an upgrade already.

+1 to why, and no it can't done without an install.

Hi Sankalp,

As other members on the forum have specified, if one wishes to move from Windows 7 64-bit to Windows 7 32-bit a clean, or "custom", install will indeed be required. Please remember to first backup any and all important data as a “custom” installation is considered to be a clean installation. Any data currently on the machine can be lost when performing such an installation. To learn more about custom installations for Windows 7, please see the following resource:

Upgrading from Windows Vista to Windows 7 (custom installation)
http://windows.microsoft.com/en-US [...] s-7-custom

To learn more about installing Windows 7, please see the following resource:

Installing and reinstalling Windows 7
http://windows.microsoft.com/en-US [...] -Windows-7

Also, to see the differences between 32-bit architecture and 64-bit architecture, you may find the following resource to be helpful:

32 Bit and 64 Bit Windows Frequently Asked Questions
http://windows.microsoft.com/en-us [...] -questions

Jessica
Windows Outreach Team -- IT Pro