What type of system and specs do you have? Do you have this problem with any other games? Have you installed or uninstalled any other software recently? Do you have the most recent drivers installed? You could try and re-seat your sound and video card while you are at it, as sometimes dust or abrupt movement can interfere with the connection. You also might try just going into safe-mode and then restarting you system as that can sometimes fix errors as well.
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