This is the default program that later versions of Windows use to display your pictures and photos when you double click on an thumbnail. Versions of this program have been found to have memory issues taking up 4GB+ of RAM.
PROCESS
P |
Microsoft - microsoft.photos.exe |
Unsure about which process is which? Certain processes looking suspicious?

Download the Performance Rescue Tool and get a complete machine analysis.
The analysis includes all running processes, including services. The tool will tell you what they are and which of your resources they're using, even how much of you internet connection they're using.
Get in the know and get control of your computer.
The download is quick and there's a free version to get you started.
Follow the comprehensive installation guide if you're not sure about downloading and installing from the internet.