After upgrading to Window 8.1 I tried to install 2 monitors. Only one works.
I have a HP Pavillion 100 with AMD Radeon HD 8570 (2 GB DDR3 dedicated).
The HDMI or the DVI connection will work separately but not together.
I didn't try two monitors prior to the 8.1 upgrade so I don't know if this is a 8.1 problem or not. Any help would be appreciated.