window7 32bit to 64bit installation problem from usb

[momo81]

Intel(R) Core(TM) i5-4440 CPU @ 3.10GHz
Memory (RAM) 4.00 GB
Primary hard disk 195GB Total
i want to install 64 bit window7 on window7 32bit clean installation
i tried drive but not success even usb i take every steps but no success i don't know why plz help

 

[gregrocker]

Follow these steps to prepare and achieve a perfect Clean Reinstall Windows 7. Everything needed is in the blue link.

If that isn't enough then Troubleshoot Windows 7 Installation Failures - Windows 7 Help Forums