Currently there is no viable option for the typical PC user besides Windows. Linux is still not ready for prime time. It is great for people who know excatly what they are doing but the average user would find the learning curve daunting. Windows is as aeasy as turn on the computer and use it. Linux requires more end user input to use simple things like a CDROM. Of course OS X is only available on a Mac (who can use Windows also btw) so PC users are stucks until someone develops a more user friendly Linux.
Try Linspire.
Looks like Windows, runs on Linux.