Michael is going with DSL Extreme and he needs a WiFi router for it. Could his old AT&T Wi-Fi modem work instead? Leo says it could act as a router, but it has to have Ethernet into it. He should make sure that he's enabled it for bridge mode. It'll either work or it won't, but Leo says that Michael should just get a wifi router instead. Leo recommends Dlink.
Dick has a 7 year old ThinkPad, and he can't get on WPA2 Wi-Fi networks. Leo suggests buying a USB WiFi Dongle. That'll take the WPA2 signal for him.
The chatroom says that it's possible to change out the Wi-Fi card on the laptop, but Leo says it's cheaper to go the dongle route. Dick just has to be sure he's using the latest Service Pack of XP (SP3). He'll also get better reception that way.
Leo says David will want an 802.11n dual-band router. Linksys is the cheaper brand, and it's not free of problems. David will want to make sure not to get one with "WPS" security. This is the "one-button-push" security, and it's very insecure. It also can't be disabled on most Linksys routers, so stay away from those.
Public Wi-Fi hotspots aren't as much as an issue with viruses, but there are other concerns. Her computer is wide open for anyone to snoop into. Her passwords could also be grabbed if the online email service she's using doesn't encrypt. A good, safe way is to use a Virtual Private Network (VPN) like Public VPN.
Leo would first check to be sure that his parents haven't downgraded to cheaper internet. If it's fast enough when connected with ethernet cable, then there's something wrong with the router. Unless he's far away from the router. One of the problems with WiFi is that less than strong signal does lower the speed.
No, those are pretty closed off. On Wi-Fi, she'll be out in the open, but won't need any kind of antivirus utility.
Leo says that colleges are very good with security, but she could use a VPN service like PrivateTunnel which would give her an encrypted tunnel to secure servers that no one would see. Also, for social media, Facebook now supports "https," (as does Google) so she should go into her settings and enable that.
If everything else is working on that network, then it's clear the laptop is the issue. It's possible that they're using a WPA2 password and the laptop doesn't support that. Since the laptop isn't that old, Leo doesn't think that's it. She is getting signal on the laptop, it's just not connecting to the internet. It could be Internet Explorer. Try another browser like Google Chrome or Firefox. It's also possible that the laptop is mis-configured for the new network. It may also be that malware is causing it, such as DNS Changer.
Since he's using the very new Buffalo 802.11 AC router, hey may be out of luck at this time. He can try using any range extender available, but it may not work with the new A/C wireless spec. Generally, Leo advises getting a Wi-Fi extender from the same manufacturer of the router, and as soon as Buffalo comes out with one for the new A/C spec, that's what he should get.