Cannot Add 3rd Computer to Network

Connect a LAN cable from Belkin to your laptop/computer's LAN port, open a browser on your laptop/computer and enter the Belkin's configuration URL. http://192.168.2.1
The default PW = blank (just press Enter) You can now change the default admin password.
You can now configure the wireless settings to protect your wireless network and Internet from unauthorized access. Now configure the wireless card in your computer/laptop with the router's wireless settings. To secure your wireless network from unauthorized access, please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

The adapter you are using is a wireless receiver. You can not connect to this adapter from another device, only connect from it to a wireless Access Point or Router.

There are ways to share the Internet connection of your computer with other devices, but you have to have your computer connected to the Access Point either via cable or have a second network card. More info here and here.

Your kindle should nevertheless be able to connect directly to your wireless network. If your computer can, your kindle should too. Is there any wireless security enabled on your network? Is Wifi turned on?

The router's encryption (password) is configured in the router's wireless settings.
Connect a LAN cable from Belkin to your laptop/computer's LAN port, open a browser on your laptop/computer and enter the Belkin's configuration URL. http://192.168.2.1
The default PW = blank (just press Enter) You can now change the default admin password.
You can now configure the wireless settings. Now configure the wireless card in your computer/laptop with the router's wireless settings. To secure your wireless network from unauthorized access, please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

F5D4075 uses Homeplug AV standard and F5D4071 used Home plug 1.0 Turbo. Both are not compatible to each other. So if you form a network, you have to form with the same standard.
Secondly, You need just one Powerline adapter on the router and you can have 2 or 3 adapter connected to 1 computer each and all these computers can connect to the 1 adapter on the router. You do not have to use it in pairs

That message means that your wireless security key has been changed to a different password. All you need to do is go to Network and Sharing Center > Manage Wireless Network, then delete all the listed wireless profiles there. Now click on Add > Add a Network that is in range of the computer > Choose your network and connect. Make sure to type in a correct network key. That should do it.

Yes they are fully compatible.

This may actually be an issue with your ISP. There is a good possiblity that your ISP has bound your connection to the MAC address of the network card on your computer. This is a common occurance which is why router manufacturers give you the option of having your router clone your computer's MAC address. Go into your router's management an perform the clone, sorry I cannot give you more details but I don't know the specific model of your Belkin router.

Check that the wireless drivers are installed properly on both your laptop and desktop. THe certificate error is because your laptop does not "trust" your computer. Under network conections click add a connection ec, and when you try to conect, microsoft should ask you weva to trust the connections from computer to computer that should do it :D

http://www.belkin.com/support/ this link might help you. you might have to call them and find out. My solution to this is that if it has done all this in the last month or so i would suggest returning it to the company and buy a different brand. that is just a suggetion

hope this works for you

thanks tazman