haha139lolo

hai, do u mean the speaker cant work at new PC but can work at other PC? then this might be very suck. The most possible problem you face now is software problem

sotfware problem got many type, i guess you update the window and also the sound card software,(if sound card is inside motherboard then find out the motherboard name, series, and download the latest software, and i also wan you to download the latest bios,if you not sure download all the software, just same as motherboard CD).

if you still cannot solve the problem, then maybe is hardware problem.

New PC with hardware problem, sounds impossible right? i can tell you, it possible, hardware problem most properly is coz by power supplied problem, or the plug in problem. send back to the computer shop and ask them for help because got warranty