It happens that our operating system is ruined and the only solution is to install it again. You may not know how to do it or be afraid to lose your precious data. Fortunately, there is an OS installation simulator but it is only intended for Windows XP, its name is Windows XP Setup Simulator. The software teaches you how to install Windows XP without any fear or risk for your system and hardware. The software does nothing but simulate the installation with all the steps to be respected as if it were a real installation, the only difference is that when it is finished, it is no use starting up. It can also be used as a guide for installing Windows 2003 because the steps for these two OS are very similar. The software also includes a document which teaches you how to parameterize Windows XP. A great help to learn how to re-install one's OS.