32 to 64 bit upgrade

I have Windows 7 Home premium (Boxed retail version).

I'm currently running the 32 bit version from the box, but I want to upgrade to the 64 bit version that was also supplied in the same box. Can I use the same CD key that I'm using with the 32 bit version on the 64 bit version when I install it?

Just to avoid any confusion, you cannot upgrade 32-bit Windows to 64-bit. You need to do a fresh install, so back up any data and settings before you commence. Windows Easy Transfer is a simple way to do this. Note that you cannot transfer programs, so you will need the original disks and keys to reinstall them.

The key provided with the retail version of Windows 7 works for both 32- and 64-bit versions. It is just possible that you might need to call the Microsoft activation number to activate the new copy of Windows, though I have never had to do this when transferring Windows 7 to a new machine (but not a 32-64 move). Obviously you will need to stop using the 32-bit install.

Thanks AEP. This will keep me occupied for a while.

Why did you install the 32 bit version to start with?

Because I didn't check to see if the PC was 64 Bit ready!

In reply to a post by Trev:

Because I didn't check to see if the PC was 64 Bit ready!

how old is the computer?

Job done! My PC is now running Windows 7 Home Premium 64 bit.

Thanks.