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I have a VPCL212FX which I upgraded to Win 8 Pro. The touch screen does not work anymore. I also downloaded the Vaio upgrade patch and that did not help; in fact I can't start the Vaio Control center in control panel
Welcome to the Sony Community.
First, download and install the NextWindow Touch Screen Driver form here: http://esupport.sony.com/US/p/swu-download.pl?mdl=VPCL212FX&upd_id=7911&os_group_id=24
Next, install the NextWindow Touch Screen Driver Update from here: http://esupport.sony.com/US/p/swu-download.pl?mdl=VPCL212FX&upd_id=8158&os_group_id=24
Next, follow all the steps mentioned below to calibrate the touch screen:
Press the Windows+C keys to open the charms menu, type control panel in the search charms and press the Enter key to access it.
Click Hardware and Sound.
In the Hardware and Sound window, below Tablet PC Settings, click Calibrate the screen for pen or touch input.
In the Tablet PC Setting window, click the Calibrate button.
Follow the on-screen instructions to complete the calibration process.
At the Digitizer Calibration Tool prompt, click Yes.
In the Tablet PC Setting window, click the OK button.
In the Hardware and Sound window, click the X in the upper-right corner to close the window.
Restart the computer.