Steam

Steam is a digital distribution, digital rights management, communications and multiplayer platform developed by Valve.

Issues

Cannot Find Steam (or similar)

Solution

1. Exit Steam by clicking on 'Steam' -> 'Exit'
2. Re-open Steam, on Windows 7 right click 'Run as Administrator'

Error adding friend. Please try again.

Solution

1. Block all communications with the player you are trying to add
2. Unblock the player
3. Add them as a friend again

This no longer works.