I have Windows XP. My printer/scanner/copier stopped working although I can print from the internet. Then my web cam stopped and then my speakers stopped working. All work on other computers. The USB port works with external hard drive and modem. New software is accepted but hardware doesn't work (I bought a new webcam before realising it was the computer at fault). It's an e Machine.
Right click and uninstall them, then restart the PC. It will recognize the new hardware on restart and then you simply need to install the drivers for them.