I have an Acer TM8572G with Nvidia screen manager and is using an external LG W2443T monitor as primary monitor on an extended screen setup. The monitor is attached via ordinary VGA socket to the laptop. It has happened a few times that the LG monitor scales itself to about 15% wider than the monitor size with the result that I have unavailable space between the two monitors. I have played around with all settings on both Win7 setup and Nvidia but cannot correct this. Previously it suddenly rectified itself after another normal rebooting sequence. It happened again now and reboot did not help nor any setup changes, disabling multiscreens or anything else I could think of... I have checked for the latest Nvidia drivers etc - no luck. Any suggestions??