Leftyjay wrote:Ill check the socket and identify the culprit but in the meantime, ill just buy an extension to connect the pc at the other end of room (room is pretty large)
The trouble with this approach is that you won't have broken the ground loop, but simply changed its size. Often this makes the offending noises worse, which is why others in this thread have already suggested plugging in all your gear to a single mains socket via one or more distribution boards.
This won't ''break' the ground loop either, but in most cases making the loop physically smaller results in lower amounts of noise, because the currents are lower.
A case in point - my own small studio is powered via a single mains wall socket, and the only time I've had ground loop noises is when I powered a master keyboard via a mains socket on the other side of the room. As soon as I moved the keyboards's power supply so it could be plugged in with all my other gear, that noise disappeared, and has never come back.
Good luck whatever you decide to do though ;)