How to change 32-bit to 64-bit

[great2s]

Hello,
I am now using win8.
How can I move my OS from 32-bit to 64-bit.
my laptop can operate at 64-bit

 

[Dark Lord of Tech]

You need 64 bit media to perform a clean install,no way to convert.

 

[soundguruman]

You have to save your files as a backup.
Reformat the entire disk. Erase everything.
Then install 64 bit.
64 bit is a fresh install, not an upgrade.