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Uncontrolled keyboard-like input not coming from my keyboard
I just had a problem occur for the second time in a few days. Some keyboard-like input was going into my computer, making it very difficult to exert much control. The input seems to have consisted of two tabs, two digits, a period, two digits, another tab and then "1S" or "2S", followed by a return. The digits seemed to be approximately 20 and the input sequence seemed to happen about once per second. I managed to save some of this sequence in Notepad. Does anyone recognise what might have been happening? Unplugging my keyboard did not stop the problem and the problem continued when I restarted my PC. I'm not actually sure how I managed to stop it - I was trying and failing to enter Safe mode when I noticed the problem seemed to have stopped. I've done an offline virus scan using Windows' built-in scanner and it didn't find anything.
Is there something I can do to prepare for next time it happens that will help diagnose the problem? Programs become pretty unusable when fed this rubbish input.
Code:19.94 1S 20.00 1S 20.06 1S 19.88 1S 20.06 1S 20.06 1S 19.94 1S 20.00 1S 20.00 2S 20.06 2S 19.94 2S 20.00 2S 20.06 2S 20.13 2S 20.13 2S 20.00 2S 20.06 2S 19.88 2S 19.88 2S 20.06 2S 20.13 2S 19.94 2S 20.00 2S 19.94 2S 20.13 2S 19.94 2S 20.06 2S 19.94 2S 20.13 2S 19.94 2S 19.88 2S 20.19 2S 19.88 2S 20.06 2S 20.13 2S 20.00 2S 19.94 2S 20.19 2S 20.00 2S 20.06 2S 20.00 2S 20.13 2S 20.00 2S 20.00 2S 19.94 2S 20.19 2S 20.06 2S 20.00 2S 20.00 2S 20.06 2S 20.13 2S 19.94 2S 20.13 2S 20.13 2S 20.13 2S 20.00 2S 20.00 2S 20.06 2S 20.06 2S 20.13 2S 20.13 2S 20.13 2S 20.13 2S 20.06 2S 20.06 2S 19.94 2S 20.25 2S 20.13 2S 20.13 2S
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