Does the range extender LED light up? Does it work when the range extender is connected to your computer? If not, i think it is not configured correctly. http://www.tplink.com/en/article/?faqid=357

I used this FAQ to share the media on my computer: http://www.tp-link.com/en/article/?faqid=340

the second light is blinking? how about the IP address on your computer? Maybe you can try 192.168.1.1 and reset the router

two reasons 1. the internet is not stable itself. If possible, try another modem. 2. If the internet is fine, you can try to upgrade the latest firmware, restore modem to factory default and...

wow, that cuts the speed so much. I heard that this kind of technology will strengthen the signal and somehow cut some speed. how did you test the speed? you can try to test the download speed with...

You want the host with a private IP address can be accessed at the corresponding public IP address (WAN 2). you can refer to http://www.tp-link.com/en/article/?faqid=381