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Nowadays, most external devices are conveniently connected to a computer using the USB ports.eg USB keyboard,USB mouse,memory stick,external harddisk,USB modem,flash disk,playstation devices etc. Some USB devices like flash drives should only be removed after stopping it, otherwise the USB device may be damaged and data lost.

No sound is a problem on the new computer or after Windows has been reinstalled. Some computers do not have internal speakers; they have to be installed externally. The audio card is often integrated with the motherboard for computers from HP and Dell. Sometimes the sound level might no suit you--too high or too low.