>Sometimes, when the interface is closed, the window settings is completely messed up. For exemple, the Toolbox reappears on the left side in a small long vertical region. To remove it, I have to move the mouse over it, wait for the window to resize and click on the X. The same happens to other related windows. As for the Solution Explorer window and those types, I have to make them appear again and dock them by the use of the arrows which appear when we move the window. is there any way to avoid that situation?

Don't know what might be causing this but look at the 'Tools/Import and Export Settings options' I think that will allow you to restore to a previously saved configuration....