Since yesterday I've started having problems with my wireless internet connection! after a few minutes of being connected it'll suddenly say page cannot be displayed and msn will sign out.

If I reset the router and repair the connection it usualy works but only for a few more minutes Even when it's not working, on the tool bar it says wireless network connection excellent.

I've tried everything system restore etc but can't fix it,if anyones got any ideas it'd be much appreciated, cheers