Patience is a virtue. Especially if you don't have an SSD and are installing onto a disk drive. I found that the installer is just large and slow on my HDD computer.

If you want to check the status, try going to task manager and seeing how of your hard drive's write capacity it's using.

As many others have suggested, waiting longer tends to solve the problem. Anaconda is large and the installation process is slow. Unfortunately the installer loading bar doesn't accurately track the progress throughout whole process and seems to run rapidly at first and get stuck at this step when it's almost done. I noticed this was very pronounced on my computer with an HDD. I remember it not being as much of an issue when I installed it on my SSD computers since they could write the data so much faster.