Windows has ruled the desktop operating system market ever since Microsoft teamed with IBM to produce the software for the first line of PCs in the 1980s. Even with other OSs available for PCs, Windows continues to dominate the market by a wide margin. Nevertheless, alternate operating systems may offer applications or features you want to test or try. Alternatively, you may simply want to install two versions of Windows. If your computer has two hard drives, you can install a second operating system on the second drive and set up the machine so you can choose which OS to boot at startup. Writer Bio
