I would suggest you have a backup PC around just in case things go awry.
I have two extra pcs. What would I do with them?
Your profile states that you're a columnist and homeschooler. If your main PC becomes disabled, I presume you'll want the ability to work on an alternate PC.
Also, I would suggest you copy important files from your hard drive to a blank CD. This is something everyone should do frequently but when making significant changes to your computer, you should definitely do this first.