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to be honest it sounds like this is more of a hardware issue. As mine defaulted to minimal settings and I was able to adjust them fine. The t.v caused no lag.

 I did however experience some lag when throwing objects all over the place.

The cursor is an issue only due to it's misalignment, although once I passed the gamma settings screen it appeared to correct itself and only became a problem at the final "lock" puzzle when i couldn't click the keys properly.