1. Microsoft Windows 8 Professional X86 and X64 Trial Only: You can download them from my Source of my project at:  https://sourceforge.net/projects/linkstoos/files/  
                   Microsoft Windows 8 Professional X86.
                   Microsoft Windows 8 Professional X64.

Live tiles on the Start screen

Download, install to try and enjoy this special product of microsoft.
Windows 8 system requirements
If you want to run Windows 8 on your PC, here's what it takes:
Processor: 1 gigahertz (GHz) or faster with support for PAE, NX, and SSE2 (more info)
RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)
Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)
Graphics card: Microsoft DirectX 9 graphics device with WDDM driver
Additional requirements to use certain features:
To use touch, you need a tablet or a monitor that supports multitouch (more info)
To access the Windows Store and to download and run apps, you need an active Internet connection and a screen resolution of at least 1024 x 768
To snap apps, you need a screen resolution of at least 1366 x 768
Internet access (ISP fees might apply)
Secure boot requires firmware that supports UEFI v2.3.1 Errata B and has the Microsoft Windows Certification Authority in the UEFI signature database
Some games and programs might require a graphics card compatible with DirectX 10 or higher for optimal performance
Microsoft account required for some features
Watching DVDs requires separate playback software (more info)
Windows Media Center license sold separately (more info)
BitLocker To Go requires a USB flash drive (Windows 8 Pro only)
BitLocker requires either Trusted Platform Module (TPM) 1.2 or a USB flash drive (Windows 8 Pro only)
Client Hyper-V requires a 64-bit system with second level address translation (SLAT) capabilities and additional 2 GB of RAM (Windows 8 Pro only)
A TV tuner is required to play and record live TV in Windows Media Center (Windows 8 Pro Pack and Windows 8 Media Center Pack only)
Free Internet TV content varies by geography, some content might require additional fees (Windows 8 Pro Pack and Windows 8 Media Center Pack only)

To check if your PC meets these requirements, you can run the Upgrade Assistant.

2. Ubuntu: A fantastic replacement for windows is Ubuntu, which is a famous distribution of Linux OS. I am using windows 8 alongside with ubuntu and i am very love both of two them. If you want to try to discover this OS, you can download it from my project free with link is shown below. I recommend you choose Ubuntu 12.04LTS version because it is very stable and it is supported upto 2017.  If you don't want it, you can download an other version.

Your Ubuntu, your way
Enjoy the simplicity of Ubuntu's stylish, intuitive interface. Fast, secure and with thousands of apps to choose from, Ubuntu gives you a clean and streamlined experience that you can really make your own.
Download link: Ubuntu12.04LTS (Long term support)

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