Upgrade to Windows 8
Are you happy with the PC you have but want Windows 8? Most PCs bought in the last few years should handle Windows 8 just fine but bear in mind you'll need at least 2 gigabytes of RAM and 20 GB of free disk space. See our Frequently Ask Questions pages for more detailed information.
You can upgrade to Windows 8 from Windows 7, Windows Vista, Windows XP, Windows 8 Release Preview, Windows 8 Consumer Preview, or Windows Developer Preview, but you might not be able to keep all of your files, software programs, and settings. The following table shows what you can keep during an upgrade, depending on the current version of Windows you are running. If you choose to boot from removable media, you won't be able to keep your software programs, Windows settings, or personal files when you upgrade.
Running Windows 7, XP or Vista?
Then Windows 8 Pro
is for you. If your PC is running Windows 7 Home Basic or Home Premium, your files, programs and settings will easily transfer to Windows 8. If your PC is running Windows 7 Professional or Ultimate, Windows XP or Windows Vista, you’ll need to reinstall your programs.
Can You Upgrade from a 32-Bit Version of Windows to 64-Bit Windows 8?
If your PC has a 64 bit-capable processor (CPU) but is currently running a 32-bit version of Windows, you can install a 64-bit version of Windows 8 Pro. However, you won't be able to keep any files, settings, or apps when you upgrade from a 32-bit to a 64-bit version.