When loading UI3 in chrome on one PC (the one I use the most), the initial screen sticks on "loading h.264 player... BUSY".

No issues in IE11 on this PC. No issues with Chrome on 2 other PC's. I've rebooted and turned off antivirus/firewall on this PC, no change.
Searching google didn't help much. It did find alot of non password controlled, port forwarded Blue Iris installs. FWIW, those UI3's opened just fine
What do I check next?

No issues in IE11 on this PC. No issues with Chrome on 2 other PC's. I've rebooted and turned off antivirus/firewall on this PC, no change.
Searching google didn't help much. It did find alot of non password controlled, port forwarded Blue Iris installs. FWIW, those UI3's opened just fine

What do I check next?