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Make sure the screen is clean and your finger is making complete contact with the screen. There may be driver updates for your specific system. Follow the link below to look for new driver updates for your specific system. You can also run diagnostics from the Lenovo site as well. As always, be sure to create a restore point on your system before you make any changes. You can do this by just typing "restore point" in the search window within Cortana and follow the link to create a restore point. Here is the link: http://pcsupport.lenovo.com/us/en/products/Desktops-and-all-in-ones/700-Series/aio-700-22ish/F0BF/002KUS/downloads
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