This 2.5in Solid State Drive can be used in a laptop or desktop is preloaded with Windows 10 Pro 64bit edition.The license key is not included but any Windows Pro 7 thru 10 license key will register and activate Windows 10 Pro edition.Windows 8-10 Pro edition license keys are automatically detected since they are stored in the motherboard Bios chip. You can force Windows to read the license key if not auto detected by clicking troubleshoot in the License key page.After installing the hard drive the system will start up to the sysprep page. Just click ok on the sysprep window.This drive has the Windows Pro release version of 2002 that was released May 2020.