The first OEM ISO of Window 10 was released on the Internet. Leakage comes from a Chinese site (bbs.pcbeta.com) and seems to be the 64bit version of Windows 10 Pro, in .img format.
Size: 4,083,855,360 bytes
The temporary installation keys as provided by Microsoft are
- Windows 10 Home build 10240 - TX9XD-98N7V-6WMQ6-BX7FG-H8Q99
- Windows 10 Pro build 10240 - VK7JG-NPHTM-C97JM-9MPGT-3V66T
- Windows 10 Enterprise build 10240 - NPPR9-FWDCX-D2C8J-H872K-2YT43
Only proceed with the installation if you know what you are doing and at your own risk. IGuRu.gr does not constitute facilities from informal channels.