Help Wifi Problem

[hexOr^]

Okay so My Wifi works perfectly fine on my laptop.
and now my friend did something on my laptop he typed on browser "192.168.1.1" and he did something there like MAC ADDRESS idk what

and now my laptop hardly connect to Wifi from 54 mbps it goes down to 1mbps
but when I connect using my galaxy tab it works perfectly fine 54 mbps

but on my laptop? :|
any help T_T

 

[Beeblebrok]

... and now my laptop hardly connect to Wifi from 54 mbps it goes down to 1mbps
but when I connect using my galaxy tab it works perfectly fine 54 mbps

but on my laptop? :|
any help T_T

Seems as though your wireless modem is fine and the settings on the Galaxy Tab seem to be fine. Edit the settings on your laptop to match those on the Tab. Can't tell you where since we don't know what OS your laptop is using.