Lenovo Y500 Wireless Issue,

Hi All
I just got my Lenovo Y500 yesterday from Frixfox Solutions
Everything about this laptop seems to be good, on paper at least

I am currently encountering a problem with its wifi.
It can suddenly disconnected from the internet although the modem is in my room.
The modem is not a problem since I use wifi on my phone and it seems to be connected all the time.

even trying to post this also suddenly internet disconnected.

I really do need help from u guys, any advice on this?

thank you very much.