No need to run the CD... How do you want to use it? Find a proper instruction on TP-LINK website and install it. http://www.tp-link.com/en/download/TL-WR702N_V1.html

So TD-8817 is running properly for internet connection, right? As you said, it forces you to enter static IP? You pressed Detect button and it is Static IP? Actually, you can change it manually....

Try to ping router's IP and range extender's IP with dynamic IP and static IP on your PC. It sounds like a compatiblity issue between wireless card and RE200. Wired connection from that PC to RE200...

Did you try the windows built-in driver or driver for Windows 8? http://www.tp-link.com/en/download/TL-WN725N_V2.html#Driver

How often does it happen? In the title you said that it works for only few hours while you also said "The frequency of this issue is like twice or thrice in a month". You'd better connect to the...

V3 cannot upgrade firmwares for V4.