Unlock window for GPS

I'm running an old vista Dell vista machine and I have a small monitor hooked from the video card to it with standard pc hook up. Then I'm runing a HDMI from the video card to an older wide screen tv 1080I,
I was trying to change video resolution on it the other night and now I can't unlock any window  like the GPS to show it over on the smaller monitor. It is grayed out. I forget how I got it unlocked in the first place. Any info on what I'm missing to unlock it from the main tv and drag it over to the monitor. I must be missing a step or I messed up the 2 monitor selection which on an old CCC ATI graphic card is easy.

Thanks Sterk