According to the MS website, Windows 7 Home Premium upgrade includes both 32 and 64 bit versions. Does anybody know if they are selectable on the upgrade? I will be running WinXP Home, which is a 32 bit OS, but I'll want to install the 64 bit version of Win 7. Is this possible, or will the upgrader be limited to the bitrate of what is already on the HDD?
For a Vista installation: An "Upgrade" is limited to the bitrate already installed. Should you decide to do a clean/complete installation to the same partition - 7 will detect the existing version, and should put your data into a folder it will create called "WINDOWS_OLD".
For XP - Back up your data and do a clean installation for either version of Win7.