This is something that is often overlooked to the headache and frustration of many would be miners. These machines are loud and hot. You essentially have an electric heater that also uses an industrial fan to keep it from melting itself. This space will need to have the electrical requirements as discussed previously.
So make sure you have a space that is well ventilated with a plan to exhaust heat, and bring in fresh dust free air. I say this as using AC to cool the room will eat into your profits and may even make mining unprofitable. The noise issue is a consideration you can sort out depending on whats available. (garage, basement, remote building)
Download a fresh copy of the miner firmware from the manufacturer's website
Load it into the miner
How to do that all depends on who makes the miner and what model it is. There are lots of posts in the Forum about how to do it, just look at posts dealing with your miner.