I have been using one or two external monitors with a USB docking station. I had all the monitors set in extended mode and the monitor connected via DVI-d was set as the main monitor. The other monitor was connected to the HDMI connector on the dock. My main external monitor also has a DisplayPort connection so I decided to see if it made any real difference if connected directly to the SP3 DisplayPort. I had the dock disconnected and just connected the cable. It worked fine but didn't make any noticeable difference. Now when I connect the dock neither monitor works, just black screen but they are detected and the display switches from the SP3 the the Main external monitor. Of course I can't see anything and if I open the display control panel it goes to the Main (black screen) monitor so I can't make any changes. if I remove the dock it switches back to the SP3 display fine but then the other monitors are gone and I still can't change anything. So how do I delete or modify my Dual/Multi monitor config? Never been down this road before... if anyone has suggestions they would be appreciated ... otherwise ill be back with how I've fixed it at some point Note this is the first time I connected the dock since yesterdays updates but I doubt that's the cause.