How to solve it? Firstly, restart helped. Now after several restarts, flickering persists. Graphic card is NVIDIA 8500GT. Thanks in advance.
closed as unclear what you're asking by Zanna, Kevin Bowen, Eric Carvalho, edwinksl, amc Feb 15 '17 at 17:32
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.