This sounds like a driver update issue. If you follow the link below to Lenovo.com support-drivers you can search for driver updates for mouse and keyboard for your specific system. Be sure to create a restore point on your system before you make any changes or download new software:
http://support.lenovo.com/us/en/products/Laptops-and-netbooks/Yoga-Series/yoga-700-14isk/80QD/003YUS?linkTrack=Caps%253ABody_SearchProduct&tabName=downloads&beta=false
9 years, 10 months ago
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Lenovo Product Expert