Find this one on one of the internet forum, so posting it here for all those who wanted to try Windows 8 OS. Not downloaded & tested by me so try at your own risk. Links will not work for long so hurry up.

Microsoft Windows 8, x86 - x64 All in one (16) RTM MSDN Original, Incl. Activator 2012, 4.73 GB.
Download Links: Part-1, Part-2, Part-3, Part-4 & Part-5.

Version's Included is:
Windows 8 x86
Windows 8 N x86
Windows 8 Pro x86
Windows 8 Pro VL x86
Windows 8 Pro N x86
Windows 8 Pro with Media Center x86
Windows 8 Enterprise x86
Windows 8 Enterprise N x86
Windows 8 x64
Windows 8 N x64
Windows 8 Pro x64
Windows 8 Pro VL x64
Windows 8 Pro N x64
Windows 8 Pro with Media Center x64
Windows 8 Enterprise x64
Windows 8 Enterprise N x64
Installation Instruction:
1. Extract ISO with WinRAR or 7zip.
2. Burn or install to USB.
3. Install Windows 8 Professional. No serial will be required.
4. Once completed and set up, run the KMS Activator tool and follow the instructions.
5. (Optional) Back up your activation with the Advanced Tokens Manager tool.

Windows 8 Pro Activator:Link
Windows 8 Activator, New version 12.10.26:Link

Note: No product key is needed. Please note that you cannot Burn it on a DVD5 and will need to use the USB install. You might need to activate it after you have successfully installed it. All version's are from Original MSDN Image.

System Requirements:
~ Processor: 1 Gigahertz (GHz) or Higher.
~ RAM: 1 Gigabyte (GB) for the 32-bit version or 2 GB for 64-bit version.
~ Free hard drive space: 16 Gigabytes (GB) for the 32-bit version or 20 GB for 64-bit version.
~ Graphics: the graphics device Microsoft DirectX 9 or later.
~ Date of Release: October, 2012
~ Developer: Microsoft Corporation