How is it plugged in to you laptop? Analog, USB, midi, etc?
i used a cable converted from 6.25mm to 3.5mm plugged into mic input...
i used the same way to connect my guitar to pc..and its worked..but it didnt worked out on my laptop...btw, im using windows 8 on my laptop...and windows 7 on my pc..but i dont think its the problem...
Unless the guitar has active electronics it does not actually produce a signal. You need an amplifier between the guitar and computer or a guitar interface device. If your guitar amp has a headphone jack, that should work.
It looks like you edited your post after I responded. Please explain the complete chain of equipment between the guitar and computer.