is your antminer on (lights blinking)?

if so, then what is you laptop IP? to find it out, on windows press WINDOWS+R buttons
in "Run.." windows that popped up, type cmd
and press OK. In CMD promt, type ipconfig /all and find your "IPv4 Address"
you should know that by default antminers IP is: 192.168.1.99, so in your web browser open:
http://192.168.1.99

if it does not open, what does the error message say?