If you then use File Checksum Integrity Verifier FCIV on the ISO, the hash should match. If it doesnt, assume the ISO has been compromised and download another. But do make sure that youre checking the right SHA 1 hash on the MSDN website your ISO might be mislabeled. Screenshot_1-1.png' alt='Windows 7 All Editions Activator Technique' title='Windows 7 All Editions Activator Technique' />The other easier, and completely legal, option is to download the Windows 8. Preview from Microsoft. Its not as snappy as the final RTMGA build, though, and has quite a few bugsmissing features. Bear in mind that if you go down this road, upgrading to a real version of Windows 8. How to install Windows 8. Once you have the Windows 8. ISO on your hard drive, the installation process is painless. Technologies de linformation et de la communication TIC transcription de langlais information and communication technologies, ICT est une expression. Windows 7 All Editions Activator Technique' title='Windows 7 All Editions Activator Technique' />Before you begin, you should consider backing up your important files and documents, but its not really necessary. You should also ensure that you have plenty of free hard drive space 2. GB. If youre already running Windows 8 and you downloaded the RTM ISO from somewhere other than the Windows Store, you can install Windows 8. ISO in Explorer by double clicking it, and then running the installer. If youre on Windows 7, XP, or bless your soul Vista, youll need to burn the ISO to a USB thumb drive or DVD, or mount the ISO using a third party virtual drive tool, like Magic ISO. If you already have Windows 8, and you waited for the official release date, installing Windows 8. Windows Store and downloading the free update. In both these cases, the upgrade process should be very smooth, with your apps and settings fully preserved. If you upgrade from Windows 8. Preview, however, you will lose your installed apps, unless you first run a cversion. Once youve installed Windows 8. Windows 8. 1 tips and tricks, and be sure to check our Windows 8. Sebastian Anthony wrote the original version of this article. It has since been updated with new information.