Internet Keeps crashing (due to a Mac?)

Question

Our internet is crashing regularly and has been doing so for the entire year that we have lived in the house. We have laptops, Xbox’s and PS3's so we previously assumed it was because of high demand that the modem it couldn't cope with. However, we have been here for four weeks without a single crash which is uncharacteristic of the usual service which crashes 2-3 times an hour and needs resetting. We contacted BT who ensured us that the line is fine
The only thing that has changed since the last four weeks to today (where the crashes are back up to 3 per hour at least) is that one person has connected their Mac laptop to the internet.
Does anyone know a reason that this is causing it to crash and any possible fixes?
Thank You.

Answer 1

DrWilliams wrote:
Just a hunch ... are you using WPA or WPA2 security, or a mixture of both?
You might improve reliability in a mixed environment if you stick to just WPA or just WPA2.  Some older hardware has do to WPA2 in software, and that can cause problems.  Try setting your router to WPA (only) and see how you get on.
My preference is to always set the router/AP to WPA2 only when viable due to "Michael" 
http://support.microsoft.com/kb/815485
http://www.wi-fiplanet.com/columns/article.php/1556321/The-Michael-Vulnerability.htm
"I have this awful feeling someone is watching every move I make (one of my pet hates is router location tagging)." Marvin (A paranoid Android)