I have a Wireless router, why does the internet connection randomly leave?

it might be a firewall on the router, check out http://www.portforward.com it gives good info on this stuff and how to fix it.
http://uk.answers.yahoo.com/question/index?qid=20090331041718AAERlXT

I have a linkseys wireless router i want to set a password so nobody can use my internet connection.?

You are going to need to contact tech support either with Linksys or the make of your computer. For example if you have a Dell, try calling them for tech help. Tech support should have solved you... Read More »
http://uk.answers.yahoo.com/question/index?qid=20080320112333AAZMVfy

Yes, its possible. If your PC that's getting online already has a LAN card but is connected to the modem, then make sure that PC has another slot for another LAN card so you can connect it to the ... Read More »
http://uk.answers.yahoo.com/question/index?qid=20061212124456AAtVtQp

Did you configure your modem or WAN connection on your router? It is evident you have connectivity to your router but the internet is only available if you have a working connection to your ISP (In... Read More »
http://uk.answers.yahoo.com/question/index?qid=20100407132510AAXgSZD

yes you need a wireless router, i know cause i have just got myself a laptop today too
http://uk.answers.yahoo.com/question/index?qid=20061210095637AA2vNke