" I can connect to a wireless network (somebody elses). When I click on Internet Explorer it comes up with "Page Not Displayed". "
There you go, it belongs to some one else.
Does the " some one else " know you wish to connect? if they do post back, or I will personally pop round and set it up for you with a modest £115,000 fee. One weeks wages for you.
get your own broadband, you can afford it.
Any way you should be off training for next week:-(