Clean the screen with a clean soft cotton cloth is the step #1
Step 2:
SEE FULL instruction HERE
Calibrate the touch screenThe
command buttons and fields are displayed on the screen image at
specific pixel points. To initiate a response, the touch screen
interface needs to recognize exactly where a fingertip or pen touches
the screen relative to the pixel position of the display. Each user has
a slightly different hand-eye coordination response. Calibrating the
touch screen allows the interface to compensate between where the
program is expecting a touch and where the touch actually occurs.
To calibrate the touch screen, place the tablet notebook in the desired orientation and do the following actions.
Compare your version of the firmware to the latest one at HP offical site HERE
Always get the latest firmware to avoid problem.
Always keep the screen clean!
sounds like you have the wrong monitor drivers installed, download updated monitor drivers from the manufacturer's website,
also check your display settings, as something is really wrong there.
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