Why is my laptop's wifi connection not as strong as my pc?

I've recently bought an asuspro laptop and had a slight trouble with it.

The wifi bars(?) is always full before i connect to it. But after i did, it became one bar, two is the most i get. my pc is using the same wifi and the connection's really fast. i can't even open google. What should i do? please help mee

Thankyou.