Turn on, turn off the hard drive:
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Pressing a keypad, input error sound
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Signal, Modem connection, interference
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Old computer keyboard
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Opens, closes the CD / DVD tray
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Manual copy machine
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Floppy disk reading
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Read the, Insert the disk into the drive
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Alarm, Computer interface
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Communication room, computer noise
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Computer mouse movement
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Turn off the old computer, Turn on
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Double click computer mouse
★★★★★
