[juneroses]

There may be a key (probably in the top row on your laptop) which can turn your wireless on and off. Perhaps it was inadvertently pressed. To ID, look for a key with a picture of a tower with signals. On my laptop, there's a small red light in the corner of the key when wi-fi is on.

Addendum: Whoops, sorry. Just read that the laptop wireless does work in the office.