Windows 10 Enterprise: CKFK9-QNGF2-D34FM-99QX2-8XC4K.Technical Preview for Enterprise: PBHCJ-Q2NYD-2PX34-T2TD6-233PK.Technical Preview for Consumer: 334NH-RXG76-64THK-C7CKG-D3VPT.Technical Preview: NKJFK-GPHP7-G8C3J-P6JXR-HQRJR.Here’s the list of Windows 10 generic key or product key or serial key which you can use in order to activate Windows 10 operating system on your PC: Microsoft always offers Generic product keys (serial key for Windows) for testing purpose and activating the operating system. Only you have to click on the Windows 10 free download link according to the version of Windows (32-bit version and 64-bit version) required and you will be able to grab the Windows 10 ISO for free: Download Windows 10 free for 32 Bit and 64 Bitĭirect links to download Windows 10 for free are given below.