If you can get in game you can try going to Settings>Graphics (settings is the gear on the bottom of the right side menu bar)
In Graphics set graphic quality level to Fastest and make sure auto-adjust quality level is disabled
Save
That might let you change zones better. It might be a RAM issue, possible not enough to allow the zone switch.
So it might help to know how much RAM you have.
You should also double check that you covered everything in
Project-Gorgon-Support-Troubleshooting-Read-First!