Download Windows 8.1 Official ISO [LINKS]

Microsoft has released the Preview edition of Windows 8.1 codenamed Windows “Blue”. For the uninformed this is an updated version of Windows 8 that was released  back in 2012. The version number 8.1 here indicates that it not a new OS but more of an update. This update is free for all Windows 8 users.

This is a preview version and may have some rough edges. So it is not recommended for production use. So don’t install it on your main system. The final version will be release later this year. The changes in this update are subtle. Many existing features are refined.

If you’re interested in downloading Windows 7 – Click here 

If you’re interested in downloading Windows 8 – Click here

UPDATE : Download Latest Windows 8.1 here

What’s New

Apps

1. New calculator, sound recorder, video editing app.
2. Internet Explorer 11 and powershell v4.0.
3. The skydrive app is revamped and is much more usable now.
4. The search app provides integrated search result from PC, web and apps.
5. Improved App Store that can update the installed apps automatically.

Usability

1. Live tiles can now be resized to smaller size. New extra large size for desktop tile.
2. The colour of start screen can be changed to any colour instead of selecting from predefined colours as before.
3. The biggest improvement in usability is that the the apps can be snapped to half of screen instead of either 25% or 75% earlier.
4. There is now a visible start button.
5. Now you can boot directly to desktop.
6. The hot spots in the upper right and left corner of the screen can now be disabled via settings.

New Technologies

1. Support for DirectX 11.2 and Resilient File System (ReFS)
2. Full support for 3D printers.
3.  

Windows 8.1 Download Links

Windows 8.1 ISO

English 64-bit (x64)
English 32-bit (x86)

For other languages visit official download site from Microsoft.

Windows 8.1 Product Guide

Microsoft has also release a beautiful product guide that explains the new features. Click the link below to download.
Windows 8.1 product guide

Product Key

NTTX3-RV7VB-T7X7F-WQYYY-9Y92F

Download Windows 8 Official ISO [LINKS]

The Windows 8 Official ISO images hosted on Microsoft’s servers are genuine and official versions, and the downloads from the server are totally free and definitely legal. Yes, there’s a catch: this is a trial version. You can download Windows 8 official ISO but it will work for 90 days, and it’s designed for hardware and software developers to test their products on.
If you’re interested in downloading Windows 7 – Click here

Download Windows 7 SP1 Official ISO from Digital River [LINKS]

The Windows 7 SP1 Official ISO images hosted on Digital River are genuine and official version, and the downloads from the server is totally free and definitely legal. It’s after all one of the official channel where end-users who purchase a license (product key) for Windows 7 get the setup installation files.
Anyway, without a genuine and legally purchased product key, you can’t get Windows 7 activated, and Windows 7 will only run as evaluation copy for up to 30 days.