I've been running a dual boot system(Win XP and PCLinuxOS)for seven years.There are some things,priority software ,that you have to use Windows.I rarely boot into Win XP as it makes me say words my mama wouldn't approve of.
My wife and two college sons run Windows,people fight change, so I get the opportunity at least once per year of reformatting their hard drives and reinstalling Windows whatever,XP,Vista and now Win7.If you use Windows you NEED to do this once per year regardless.
I am the one eyed man in the land of the blind in my neighborhood so I help my neighbors keep their windows machines running.The newer machines are relatively easy to restore,older machines can take hours
I must admit that a few years ago my linux operating system went kaput.It took me a whole twenty minutes to reinstall and be up and running again.
Visit
http://distrowatch.com/ and you can download linux distributions for free and burn a live CD or buy the CDs for $2.95 plus shipping.Make sure to download or purchase a live CD. Linux operating systems will run from the CD and if you have enough ram the whole system will load into ram and run very fast.You do not have to install anything.Its like a test drive to see if you like it.If you decide to install find someone with a little know how the first time and you can have a dual boot system with windows and Linux.If you choose to run your computer from a live CD you don't need a hard drive in the computer just a usb stick to save things to.I've ran computers for months with no hard drive.
Linux is faster,more secure and free.There is a learning curve but with a dual boot system you can take your time.If I sat you in front of my laptop to surf the Internet,read E-mail instant message the only thing you would notice was how fast it was.