Impossible to type w/o cursor jumping around, sometimes deleting everything, opening the 'undo, cut, copy, paste' window', attaching files, opening the webpage coding window, etc. Sometime just impossible to send a simple email or facebook post. Can this be out of date drivers? Norton says 'no viruses or malware '. Malwarebytes suggested I contact you as they agree with Norton. Can you help? I have 2 older Acer laptops, one win10 and one win7. grrrr!!