Any Vaio Pro 13 users upgraded to Windows 8.1? I seem to have a problem where the damn screen will go to sleep ... and then after that refuse to wake up again ... especially true when closing the lid ... walking to another location .. open the lid ... the green power light still on .. but no response from the screen ...

Had to turn off the notebook and turn it on again to solve ... irritating ... feel like going back to Windows 7 since Sony recently released the Windows 7 drivers

Anyhow .. I found the solution. Just uninstall the graphic driver and install the latest one from Sony Support website (for some strange reason, the Asia Pac one not updated with Windows 8.1 drivers) ... you need to get the drives from Sony USA.