@Lisa Maree and @Patio,
I did what I did earlier and the monitor setup worked this time. I uninstalled the AMD Catalyst converter driver by using revo uninstaller, rebooted, then I uninstalled intel management components using revo uninstaller, rebooted into safe mode, uninstalled intel hd driver using revo uninstaller, and uninstalled it again from the device manager. Then I rebooted, and installed the intel mangement driver, rebooted and then somehow the second driver showed up in device manager. So, I installed the AMD driver (SP50640), which changed the basic vga adapter into the ATI adapter and also added the ATI sound driver . I have attached screenshots of the device manager, the right click menu on the desktop that shows switchable graphics, showing both the adapters under display in device manager.
But why does this sequence work sometimes and not work other times? And why does the dual setup stop working when I reboot sometimes? Ive noticed that if I start the computer say within an hour of the last session (when dual setup worked), the dual setup still works. But if I keep the computer shutdown more than one hour, then that configuration is lost.