Linux Mint

If you have an old PC running WindowsXP, which hasn't been getting security updates now for 223 days, you might want to consider installing some variety of Linux, and a good choice would be Linux Mint.  I blew away Windows on an old laptop over the weekend with Mint, then loaded my favorite web browser, Google Chrome, and LibreOffice, a free (I love free) alternative to Microsoft Office.

http://www.linuxmint.com/