Adobe Premiere CS5 Running really slow and Fade to black Issues.

So recently I have been having issues with performance with Adobe Premiere. For one when I try to preview any of the video it doesn't play properly when I use to be able to do this. Also exporting is taking incredibly long. The estimated time just keeps going up. Right now its 5 hours to render a 18 minute video at 1920x1080 30fps. I have rendered video before around this length that took around 3 hours and that wasn't too long ago. I also tried emptying my media cache and I think I noticed a slight improvement.

I was also going to post about an issue I had with my last exports with the fade to black. I believe in the preview inside premiere the fade to black would be functional but when exported it would stutter. Here are two videos where the issue where present.

https://youtu.be/X8Q3bbKCwRw

https://www.youtube.com/watch?v=3BavHz_sOXM&t=677s