Can I upgrade a Thinkpad R500 2714 to Windows 7 (64 bit OS) ?
You can upgrade the operating system if you had ordered a R500 with Windows 7.
The COA key label is displayed under the laptop. The COA is valid for either 32 or 64 bit versions of Windows 7 provided the same version (home premium, professional, ultimate) is used.
The COA is valid to activate OEM versions of Windows. Switching version will require a retail or upgrade COA / Activation key.
For more information on COA key, please review: