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HP 6450b, upon start up at lock screen I can't control mouse
I have windows 10 installed. Half the time I get to the lock screen, the mouse pointer will flicker back and forth up top and I cannot control it. If I try logging in with my password, the mouse will continue to be uncontrollable. I then have to restart. Sometimes I have to restart a few times because it does the same thing. Yet other times it works fine. I've tried uninstalling the driver for the mouse and reinstalling it several times but it hasn't solved the problem. Any suggestions?