NOTE: This is Microsoft original ISO image pre release software.
Windows 10 Insider Preview may be substantially modified before itÆs commercially released.
Microsoft makes no warranties, express or implied, with respect to the information provided here. Some product features and functionality may require additional hardware or software.
By default, Windows 10 builds are pre-keyed, meaning, you do not have to enter a product key and should not be prompted to enter one even after Windows 10 has completed setup.
If you are are being prompted for a product key, these are keys that you should be using depending on the edition you have installed:
Mitigation Product Keys (pid.txt):
The current Win8.x product keys no longer work; users must instead use the following Windows 10 Pre Release keys:
Windows 10 Core: KTNPV-KTRK4-3RRR8-39X6W-W44T3
Windows 10 Pro: 8N67H-M3CY9-QT7C4-2TR7M-TXYCV
Windows 10 Enterprise: CKFK9-QNGF2-D34FM-99QX2-8XC4K
Windows 10 will be free Update to existing Windows 7, 8/8.1 users for the first year.
Regardless of this, product activation remains a part of Windows 10 in current previews.