Hi Chris,

Photoshop can sometimes show unexpected hangs, slow performance and sudden crashes. In order for it to function properly it needs a lot of RAM and a clean operating system.
So, you can try the below fixes in order to make it run smoothly and keep your computer crash free.

Fix 1: Update the software
The first step is to update your operating system. Make sure you have the latest drivers for your programs and devices and make sure you’re running the latest version of Photoshop. Many problems can be fixed with this one step.

1. Start Photoshop 2015 and choose Help > Updates.
2. The Adobe Application Manager will launch.
3. Select Adobe Photoshop CC 2015 and choose Update.

Fix 2: Check the Efficiency Indicator
To turn on the Efficiency Indicator, go to the bottom of the image window and click on the pop-up window and choose Efficiency.

At the moment, you can see my computer is running at 100% efficiency. Anything less than that is using the scratch disk(s) and will be slowing down your computer.

If the efficiency is less than 90-95%, refer to Fix3 to improve your system performance. If that doesn’t work, consider adding more RAM if your computer will support that.

Fix 3: Set Preferences File in Photoshop
Go to Edit: Preferences: Performance. In the Memory Usage section, try setting the slider to 70% and test it. If you receive memory errors, reduce it.

The next step is to set the History and Cache. Photoshop comes with a default setting of 20 levels of History. Reducing this number will reduce the need for memory. The Cache Levels control screen redraw and histogram speed. If you work with large files with few layers, try increasing the Cache Levels.

If you work with smaller images with many layers, reduce the Cache Levels. This should improve Photoshop performance.

Fix 4: Try cleaning up your PC
If you’re getting close to the space limits your computer will begin to slow down and become sluggish. Delete as many files as possible.
If that’s not an option and you need those files on your hard drive, consider upgrading to a larger (and faster) hard drive.

You can also use PC Reviver to do this job for you.
PC Reviver is a multi-purpose utility that will diagnose errors on your PC, safely repair them, and provide other maintenance and optimization recommendations.
PC Reviver is the trusted and recommended way to restore optimum performance and stability to your PC.
PC Reviver includes advanced diagnostic tools that will perform a comprehensive and complete scan to find problems with your PC. PC Reviver will safely fix these problems and perform other optimizations to restore optimum performance and stability to your PC.

For more information you can visit the below link:
http://reviversoft.c...

Fix 5: Use Purge
When working on images, Photoshop stores data for Undo, Clipboard and History. The downside is the amount of memory used. To free up RAM, go to Edit: Purge: All.
You can also purge the Video Cache. Note that using Purge will delete your History and you won’t be able to undo your latest changes.
Also note that if you make a mistake, there’s an Undo option.

I hope this helps in fixing the Photoshop's sudden crashes.

Regards,
Lokesh