WHY because Why waste that old Hardware, its bad for Planet Earth.
Get the most worth out of your PC ass long as it works well.
How to Break free from the cycle of Planned Obsolesce?!!??
Stay safe with Linux.
There is a very good chance Linux OS will run well with older hardware with lower specs
Switch to the free, safe, secure & awesome OS: www.ubuntu.com/download
Its the worlds most popular free OS. It has free upgrades & security updates. It has a free office suite, LibreOffice that comes standard along with other great apps/programs.
For those who like the Windows look, I would recommend: www.kubuntu.com & for older computer with lower specs www.xubuntu.com or http://lubuntu.net
Or try Linux Mint: http://linuxmint.com
Because the Linux option is free & now so easy (user friendly) one must give it a try. You have so much to gain.
Lots of people give their time, effort & money to make these great products that they just give the world for free. So they may not have the huge ad budgets & would need users like us to spread the word. Although its free, you are welcome to donate if you like the software.
For those worried about Office 2003 support ending try LibreOffice or OpenOffice.
Time to check out the free, safe, secure & feature-packed LibreOffice. Its truly multi-platform & takes just a few minutes & clicks to install.
Try it now you have so much to gain: www.libreoffice.org/download
Thunderbird is safe as well.