Hi everyone.
I've got this strange problem that's become a reoccurring issue recently.

Only while inside instances (including the inn rooms) or during cutscenes, my fps will occasionally drop from smooth (40-60fps depending on the player population) to unplayable (5-9fps). The problem only lasts for about thirty-seconds to a minute, and then goes back to normal.

This issue does not occur in any field/overworld location, only in instanced content/cutscenes. It doesn't happen in any other online game I own (though it has on one of them in the past, but not anymore), and my computer seems fine otherwise. I think I remember seeing a spike in my CPU usage while it was happening.

I've tried restarting my laptop, checking for viruses/malware, getting updates for all my drivers, and performing a hardware scan. So far, the issue hasn't been solved. Google searches have been less than reliable for this as well, so I'm at a loss as to what to do currently.

If you have any ideas or advice, please let me know. However, please understand that I'm not a very tech-savvy person at all, so you'll have to give me a walk-through for any technical process.
Thank you!