Well, I don't think connecting to a router will cause blue screen error on lapotp... You should check your laptop...

YES, you can. Follow the guide below. http://www.tp-link.com/en/faq-258.html

Is it WA701N or WA701ND? What's the hardware version? On bottom of it, what's the default access? In default settings, connecting to your PC by wire, what's the IP address obtained by DHCP on the PC?...

What does it mean? Can you give an example?

Did you upgrade the latest firmware? If the problem continues, provide the system log when connection becomes down.

It has no QOS priority control function.