How to upgrade my windows 7 32 bit to 64 bit?

[saivikas]

I have a laptop that is perfectly compatible with 64-bit (I've verified it and I am very sure). I have installed a 32 bit version of windows 7. Now how to upgrade to 64-bit...? Remember, my installation dvd has no installation files for 64-bit. Please help.. thanks in advance

 

[AddRAM]

You can`t upgrade to 64 bit. You have to reinstall with a 64 bit installer. Do you have a windows key ?

 

[bobkn]

You can't do an upgrade-in-place from any 32 bit version of Windows to a 64 bit version. You'd have to do a clean install.

The main downside to that is whether you have any pre-installed software that you'd like to keep. There would be no practical way to transfer that to the new Windows installation.

You may find this of interest:

http://www.sevenforums.com/tutorials/219487-clean-reinstall-factory-oem-windows-7-a.html

It's aimed at getting a bloatware-free version of Windows, but it will serve in changing to 64 bit.