i can connect to the internet through wi-fi before. but recently unable to connect to the wifi (probably after a cousin of mine insert a pen drive usb to my laptop. is it something to do with the setting in my laptop? what can i do about that?
Can you see any networks in the wireless icon in your system tray - bottom right hand corner of the screen? If there are none, it may be that the wireless adapter is turned off. Look for a small switch on the front or side of the laptop, or one of the Function keys with a wireless icon on it. Press that one and the Fn key to the left of the spacebar at the same time to turn it back on.