Recently, the internet access sign comes up "Limited access" when connected .. I disconnect, and when I reconnect it it says something along the lines of "networks unavailable" .. the computer to which the modem is full-time connected to works fine, unless the light under "internet" is off .. but then i merely have to go back to the home page or any page at all and it comes back on,whereas it doesn't for my laptop ... also, when I troubleshoot the problem it says I have to connect an ethernet cable into the laptop, or sometimes no answer is given at all .. other times, the computer goes black .. not off, just black, so I turn it off and restart it.. usually, restarting the laptop works but recently it doesn't work at all so I have to restart it several times before it works, and when it does it's for 5 minutes max .. I've googled similar problems but yet nothing has resolved the problem .. when I checked the wireless properties it said the device was working fine, which is true but just for my laptop it's not .. can anyone please help me? It's extremely irritating, and soon I'll be needing the internet to help me with homework, if not for anything else ... Thanks.