When setting up a computer for a friend or associate I usually make sure that these things are installed because they are, I think, "vital".

- Antivirus/Anti-Spyware software
- Firefox
- Adobe Acrobat
- An office suite (Open Office or MS Office)
- RealPlayer and Quicktime
- DVD Player codec (if he or she has a dvd player)
- CD burning software
and Filesharing software so that he or she can download copies of media that he or she already owns.

Are there any other programs that you guys think are "vital" when setting up a computer? Or are there programs that you guys always install on a system for a certain reason?