BOAC is talking a lot of sense. As someone who works for a VERY large IT firm (think HAL) I get asked such things frequently.
I would suggest something else: buy yourself a few meters of CAT-5e ethernet cable (even Tescos sell the stuff - if not Maplins) and connect your device directly to the wireless hub (there will be ethernet ports round the back), switch off wireless on your computer (connect directly) and wait.....
If your internet STILL dies then you are (probably) looking at ADSL issues so call your ISP ( and don't let them say that it is the phone companies problem - it is NOT) and get them to test lines etc
The above by-passes your wireless. If only the wireless drops then the issue is with your wifi ....
Last edited by Unixman; 10th August 2013 at 12:55.