Intermittent Wireless Capability

I have a Gateway ML6732 laptop , which is about 1.5 yrs. old , with Vista HP o.s. . I mostly depend on hotspots for internet use , and have an account with RoadRunner.The spot I usually use has a strong signal which is always present . Lately , about 1/2 the time , I cannot hookup to RR , or any other present signals . I do all the diagnostics and repairs , resetting the net adapter , etc., to no avail , and get a notice "this computer has little or no connectivity " Could the adapter be outdated or what ? Any ideas ? Thanks 4 any HELP , in advance !!!