This game is old, showing its age, and may not be supported on future operating systems well. As an example, the IRC program inside doesn't run well with current IRC security protocols (it /does/ connect to real servers.)
But that doesn't mean this is a hell of a good game and still pretty much one of a kind.
This game takes inspiration from Hollywood hacking and turns it into an excellent simulation of such. A sandbox roguelike of sorts, you need wits, some planning, and a little luck to become rich, powerful, and save the internet from some bad guys that feel it's time to unplug everything.
I believe Introversion could make a new Uplink with the skills they've gained from the games they've created since 2001, and release something truly golden. The market for hacking simulations is pretty much dominated by this decade old game, something more 21st century would most definitely be a hit.
Until then, enjoy Uplink, and good luck on the net.