Depends on your computer's processor, both versions are sold by Microsoft and are available at most computer retail stores. Most modern computers have a 64-bit processor, so you'll probably be able to find 64-bit Windows more easily.
You have to buy the 32 bit version and reinstall windows with the 32 bit version you bought
If you are currently running a 32-bit version of Windows, you can only perform an upgrade to another 32-bit version of Windows. Similarly, if you are running a 64-bit version of Windows Vista, you can only perform an upgrade to another 64-bit version of Windows Vista. If you want to move from a 32-bit version of Windows to a 64-bit version of Windows Vista, you'll need to back up your files and then perform a custom installation of the 64-bit version of Windows 8. For more information, visit the Related Link:
The free upgrade to Windows 10 typically refers to the upgrade from Windows 7 or Windows 8.1 to Windows 10, and it can include both 32-bit and 64-bit versions, depending on the version you are upgrading from. If you are running a 32-bit version of Windows 7 or 8.1, you will receive the 32-bit version of Windows 10; similarly, a 64-bit version will upgrade to 64-bit Windows 10. To take advantage of the 64-bit upgrade, your hardware must support it.
windows 3.1
No you can't because 64-bit won't run on an x86 (32-bit) PC. You have to have the x86 version.
Windows 7 Starter
how can i upgrade my 1997 version 32 bit creatacard to 64 bit window 7
No, 32-bit printer drivers will not work in a 64-bit installation of Windows. The operating system requires drivers that match its architecture; therefore, a 64-bit version of the printer driver must be installed for proper functionality. If only a 32-bit driver is available, users may need to find a 64-bit alternative or use a 32-bit version of Windows.
There is no 64-bit version of Adobe Flash Player currently available for Windows. You must use the 32-bit version, along with a 32-bit browser.
Starter.
Starter.
Only the Windows 7 Starter.