How to upgrade from Window 7 32 bit to Windows 7 64 bit ?

[Golden]

1 year has been past, but, anyway...

From Microsoft site:

"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."

Source:
32-bit and 64-bit Windows: frequently asked questions

You misread the original post....Windows 7 32 bit to Windows 7 64 bit....not Vista

 

[thebradpitt]

Yes, thanks Golden, I've noticed that it is wrong quotation at the moment of putting it here so I've edited the post immediately. Anyway, links in it could be useful for someone who have similar problem.