One Windows is way too risky. 4PCs-in-1 makes it childishly simple for you to make a live clone of the Windows System that you are running! Then you have 2 Windows Systems on the same drive letter in the same partition on the same disk. Swap between them with a double click. Now you are immune from the next Windows disaster. We all have two lungs because breathing is important. Likewise clone at least 2 and preferably 4 Windows systems because Operating Systems are important too. If you have a power hungry application do you think it will run well along with 10 different games, Microsoft Office, antivirus, firewall, anti malware, anti adware, anti zombieware and 10 other aplications you tried once but no longer use? Of course not. Give it its very own Windows System! The limiting factor in PC performance today is Windows loading. Clone a few more copies with 4PCs-in-1 and spread the load. You will have far fewer Windows crashes, far better performance, and it will not be a total disaster if you lose one of your many systems. It is better to have 4 aircraft carriers than one. It is better to put your applications in a 4 bedroomed house than in a studio flat. It is better to put your files in a 4 drawer filing cabinet than a 1 drawer filing cabinet. There is not point having a ferrari with an elephant in the back seat. Get 4 ferraris and put a quarter of an elephant in the back of each one. If you want to try out more than 50 applications in your life. You need 4PCs-in-1. How many times have you re-installed Windows in your life? Get 4PCs-in-1 and you will never have to do that again. The purpose of a computer is to preserve information not to lose it everytime you re-install Windows! If you truly want to make any examination of all the wonderful Windows software out there. You plainly need more than one Windows system. Hence 4PCs-in-1