Preview not working

Hello. I've installed After Effects on a new computer, and I'm having trouble getting the preview window to play or show anything (see images below ). 

If I have music and play, I can hear the music play but the timeline won't keep moving along.

I've tried all the usual stuff (purge cache, uninstall/reinstall, updated my graphic driver, change system setting to be adjust for best appearance, etc.) but nothing has changed.

I would be very happy if you can help.

Thanks.