I have been using Movie Studio Platinum 15.0 for 3 or 4 years and never had an issue like this. I am exporting a video (1920x1080) that consists of two video files and their associated audio files. The estimated size is just under 6.0 GB and yet the export is taking upwards of 7 hours (I haven't been able to get it to finish, that was the longest I waited). I checked and it's using 100% CPU (specs listed below). I have updated all drivers, checked the original file sizes (two from a cell phone camera and one from OBS), tried exporting to both the hard drive and SSD and updated windows. I have no idea why it's taxing my set up so much because I've exported videos from this desktop before with no issues. Any advice?

Specs:

MSI Codex R 10SC-006US

Intel Core i7 10700F

Memory/RAM 16GB DDR4

1TB HDD

512GB SSD

GeForce RTX 2060 Graphics Card