I have had wirless internet for 3 years.  All of the sudden I am having trouble connecting to the internet.  I was out of town and ever since I returned my computer/router/wireless internet is acting up.  I am able to connect to the interent sometimes after I turn off my computer, my modem, and my router.  I wait several minutes and then power things up.  I power up the modem before the router and wait for the lights to stablilize.  If I shut down my computer or put it on stand by I lose the connection.  It says that I am connected to my network, the signal strenght is great, but that there is limited or no connection.  I am not sure what is going on or how to fix it.  I called my internet provider and we checked everything.  It doesn't seem to be a problem on that end.  They thought maybe something was going on with my wirless card.  There are two other laptops (my Kids) and they are having no problems.  I could use any help anyone is able to offer!  Thank you in advance.