microsoft.photos.exe is a application which is probably legit. So, if microsoft.photos.exe is on your PC, it is probably ok, and will NOT cause problems. Even if your system is clean, we still advise you to purchase a well-known antivirus with a good track record, in order to yourself yourself against threats.
This application is usually found in C:\Program Files\WindowsApps\Microsoft.Windows.Photos_15.1001.16470.0_x64__8wekyb3d8bbwe\Microsoft.Photos.exe.
The MD5 checksum for this file is c0fb6e2e3601eb3b92a1b1aba790c8e5.
This program does NOT operate as a Windows service. This is usually a good sign.
This is a 64-bit executable. It uses the full capacity of modern CPUs.
The description extracted from the program is Microsoft Photos.
File version 15.1001.16470.0.
Legal copyright Copyright Microsoft Corporation.
microsoft.photos.exe appears to have visible windows. This means it doesn't run in some kind of invisible mode. Its activity is clearly displayed to you.
A digital signature is missing from this program. The maker did not bother to sign it. This is probably bad.
This executable does NOT have an uninstall command set up in registry.