Please check these articles.
Thank you but my issues are still not solved. Is there any possibility that I could download Lightroom 5? I need something that I know is going to work. I am not able to rely on Lightroom CC anymore for my basic photo editing needs.
I suspect that this is your main issue;
With 27GB free space of a 256BG hard drive
You simply do not have sufficient free space on your HDD 10% of the drive is just no cutting it.
Time to replace the existing drive or attach a portable drive and transfer files from the main drive to allow at least 75GB of free space.