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