The Windows 8 Release 
Preview Setup tool is, in theory at least, the simplest way to install 
and try out the latest version of Windows on your own PC.
 
  
   
                            
    
    
   
You need to be very careful where you use the program. Although 
Microsoft haven't tagged the Release Preview as a beta, that's exactly 
what it is: an incomplete, unfinished operating system which will 
contain bugs, and can't be uninstalled. In a worst case situation, you 
could find yourself left with a PC which won't launch properly, forcing 
you to reinstall everything all over again. This isn't likely, but it's 
possible, so only use the Setup tool on "spare" systems or PCs which are
 fully backed up.
          Still reading? The good is that such disasters are unlikely; the 
Release Preview is relatively stable, and ought to work on any hardware 
capable of running Windows 7. And the Setup tool makes this all very 
straightforward.
            The program will first check your system for hardware and software 
issues which might complicate the installation, reporting on anything it
 finds.
            After obtaining a product key it'll then download Windows 8 Release 
Preview. This may take a while - it's around 1.5GB of data - but you can
 pause and resume the download as many times as you need.
              Once the Setup tool has the core downloads, it'll expand them into 
the Windows 8 Setup files, before offering you three options: Install 
(on the current partition), Install to a different partition, or Install
 later.
            The first two will launch your setup program now. The third, we're 
less sure about; it simply closed the Setup Tool without further 
explanation, and when we relaunched the program it started from the 
beginning, with the initial compatibility scan. This may have been some 
issue local to our setup, but for now we'd avoid "Install later", if 
possible, and instead choose one of the other installation options to 
fire up the final Setup process.
From this point, fortunately, there should be no further issue. 
Microsoft have greatly improved Windows setup in recent years, and a few
 minutes spent following the installation wizard will be enough to 
prepare your own copy of the Windows 8 Release Preview.
   Platforms: Windows 7 (32 bit), Windows 7 (64 bit), Windows Vista (32 bit), Windows Vista (64 bit), Windows XP
Version: 8.0
Licence: Freeware
Manufacturer: Microsoft
   
Version: 8.0
Licence: Freeware
Manufacturer: Microsoft