![]() ![]() You will then appear to be in DOS and can "ping" etc. Just click "Start" then "Run", and type "command". Vista has an emulation of the "DOS prompt". Vista on my laptop keeps losing contact, but in my case it is probably a weak signal (through two walls) and a dodgy WiFi router, plus an intermittent internet connection. I have regular problems with my WiFi and I often go through these processes (in desperation, probably unnecessarily). ![]() The "diagnose and repair" option should then reconnect, but, if it doesn't work, try resetting the network adaptor, and try disconnecting, then reconnecting manually. In "security", you can check that the correct encryption is being used by the laptop, and the correct security key (check with other connections). ![]() ![]() The WiFi should show here, and you can configure the laptop to connect automatically (and even if the network is not broadcasting). Then, in Windows "Network and Sharing Centre" (from Control Panel), click "Manage Wireless Networks" (on the left). 72.89.106.242 ( talk) 04:18, 17 October 2010 (UTC) Reply First, move the laptop next to the WiFi transmitter, just to check that there aren't any problems with interference. Windows Vista doesn't even seem to have a way to get a DOS prompt any more (or anyway I don't see it in the start menu, but I'm a Unix user clueless about Windows in general). More generally, what kinds of methods does one use to diagnose this type of thing? I don't see any way to get any indication of what is actually going wrong. Now the laptop's connection manager finds the AP and connects to it just fine, but the browser (IE8, I think) says it can't connect, and "diagnose problem" gives a useless message like "windows can't resolve this problem". It worked fine with my bro's computer until yesterday or so, but he seems to have screwed around with some settings or something, that messed it up. The connection would be through the wifi access point which is in the same room and which works fine with other computers. I'm trying to figure out why my brother's windows vista laptop suddenly won't connect to the internet any more. ![]()
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