Internet constantly disconnects ;(

if it turns out to not be the ISP, try updating your Network Interface Cards Drivers.

Also wont hurt to renew your ip.

start>run>type "cmd" >hit enter.

type "ipconfig /release"
then type "ipconfig /renew"

May be that your nic is going bad and you may need a new one.

Good luck

Okay, I've just tried both of your solutions but to no avail.

Sigh, this is really causing me heaps of trouble. ;(

Thanks for your suggestions though.