32bit or 64 bit

[aliyarn]

i have just purchased hp envy and before openning i read in tiny print that i needed to purchase 64bit os and software is this necessary on windows 8 and if so how do i do this

 

[abbadon_34]

Win8, who knows. Win7, use what you want, but these days 64 is preferred unless you have specific compatibility or 16 bit needs and refuse to dual boot

 

[manofchalk]

Unless you have a specific reason to use 32bit, you will want to use a 64bit OS.
Heres Windows 8 64bit. Its an OEM copy, so the product key is only valid after its first use if its used again on the same laptop.
http://www.newegg.com/Product/Product.aspx?Item=N82E16832416550