Moot point now if you've decided to stay with your current OS, But, A couple suggestions if/when you ever do upgrade in the future.
1. Always Always buy the Full version of the O.S. Most of the time "upgrades" don't cut it if you have a system crash that requires re-formatting.
2. As a general maintenance rule: Format your hard drive every 6 months or so. After time, if you do a lot of downloading installing/uninstalling your registry is going to get cluttered. I use a ZIP drive to save the most up-to date versions of my software (things Like AH, soundpack, etc.) Always works well for me anyway.
Good luck ,
Hamish!