Internet is slower all of a sudden..

[Mark]

By you, just one machine - preferably the wired machine. Turn all of the other machines off, (3 laptops), just shut them down.

General steps,

• Turn all machines off, (including your desktop)
  
• Turn the router off
  
• Turn the modem off
  
• Wait 2-5 minutes
  
• Turn the modem on (wait for it to do it's stuff and give the green lights)
  
• Turn the router on (again, wait for it to do it's stuff and give the green lights)
  
• Turn just your desktop on.
  

edit: also, if you have an xbox or a console turn them off - they're networked devices. (Or just don't have them on the network for this test)