Premiere Pro CC no longer exporting at usual quality or speed
I'm using the latest version of Premiere (11.1.2) , my PC has an i7-7700 CPU and 16 GB of RAM. I've been shooting all of my material for an upcoming short film in 4K at 30fps, so I've been exporting all trailers and videos in YouTube 2160p 4K. This has been working great for me for the past few months, but recently, I attempted to export a short video (10 seconds) in 4K, but Premiere crashes at 3% every time. I tried this with a longer video (1 1/2 minutes) and it did the same thing to me. I also tried to export at 1080p 29.97 but this 10 second video took almost 10 minutes, which has NOT been the norm. Any possible solutions would be greatly appreciated as I do have some deadlines I'd like to meet. Thanks.