Windows 7: Can I install Windows on my slave drive?

Customization discussions aside, the answer to the question (if you can have BOTH the 32-bit and 64-bit versions running) is basically -- NO, not legally. You can have either of the two versions in use, but if you switch over to the 64-bit version, you are required to uninstall the 32-bit version.

I answered your question here:

If you haven't gotten it yet: when you customize/tweak beyond recognition the first featherlight Windows OS you have an unstable mess which defeats it's greatest strength.

Hi Badrobot

You may have your preferences with the massive tweaked Windows you've been running for year, then you may have to stick with it.

But, if looking into all given suggestions above, I think you may consider seeing it from different angle. Start with 64-bit clean installation is not a bad choice at all. Later you can find ways to have some of your preferences.

People in this forum are going to be perfect assistance in doing so.

That's my two cents.

Hi, Currently I am running Windows XP 64bit on my first hdd, I would like to install Windows 7 on my second hard drive, does anyone know how to do this so i can keep Windows XP on my first HDD without loosing all the data for XP and have a dual boot between Windows XP 64bit and Windows 7

video converter

Best to unplug the XP HD while installing Windows 7 to it's target HD, then after install plug back in the XP HD and boot it when needed by tapping the F key given for one-time BIOS Boot Menu at boot.

If you don't prefer this method then install EasyBCD to add XP on it's Add OS tab to create a Windows Dual Boot Menu.