Upgrading Windows 7 home premium 32 bit versions to Windows 7 home premium 64 bit ver

[dare_devil]

i purchased dell studio 15 laptop in august.At that time i got windows vista home premium 32 bit.I have 4 gb RAM on my laptop.I bought my laptop under the scheme of upgrading option of Windows 7 home premium 32 bit.I got Windows 7 home premium 32 bit some months ago.I installed it on my laptop.I get a serial key also.I wanted to know that if there any possibilities to upgrade my Windows 7 home premium 32 bit into Windows 7 home premium 64 bit from microsoft with any options.or otherwise i have to buy seperately Windows 7 home
premium 64 bit from microsoft???if it is possible then how...?

[quan chi]

yes you can.Details are given here.http://windows.microsoft.com/en-us/w...sked-questions