[supercat]

But why would Sony want to prevent uninstallation?

[TechJunkYard]

To enforce playback restrictions on computers.

1. You can only use Sony's software.
2. You can only make so many (three?) copies.
3. You can't port individual tracks to your portable MP3 player.

Sony BMG said it stands by content protection technology "as an important tool to protect our intellectual property rights and those of our artists."

But never mind the consumers' fair use rights. Remember, computers == piracy tools.