How to turn 32 bit to 64 bit for windows 7

Get the windows 7 64 bit disk and install like any OS.

Need to go to your PC's Manufacturer's website and download the 64bit drivers. Most sites get you to choose the OS 32/64 bit first....

The 32 bit Windows 7 and 64 bit Windows 7 are effectively different operating systems. If you want to switch from one to the other, your only option is to install the one you want. There is no switch.

buy a windows upgrade disc

http://windows.microsoft.com/en-us/windows7/32-bit-and-...

Can I upgrade from a 32-bit version of Windows to a 64-bit version of Windows 7 or from a 64-bit version of Windows 7 to a 32-bit version of Windows?

You can use the Upgrade option during Windows 7 installation, which preserves your files, settings, and programs, only if you're currently running a 32-bit version of Windows Vista and you want to upgrade to the 32-bit version of Windows 7. Similarly, if you are running a 64-bit version of Windows Vista, you can only perform an upgrade to a 64-bit version of Windows 7. For more information, go to Upgrading to Windows 7: frequently asked questions on the Windows website.

If you want to move from a 32-bit version of Windows to a 64-bit version of Windows 7 or vice versa, you'll need to back up your files and choose the Custom option during Windows 7 installation. Then, you'll need to restore your files and reinstall your programs. For more information about performing a custom installation, see Installing and reinstalling Windows 7‍.