  Neither do I. The fact that none of this hardware was approved for Windows 10 may be the issue here with the latest Windows 10 update. Moving this thread to the Windows 10 board to see if others can chime in.
After installing the W10 Fall Update to my Inspiron 570, the display size on the ST2210 monitor has reduced from the full 21.5" to 19.5". Having spent time searching, I haven't found any similar issues. Display adapter installed is the most up to date. Help please!      
Monitor display size change after windows fall update