What is the startup program "iCloud for Windows - iCloudPhotos.exe" on my Windows 7 computer?

"iCloud for Windows - iCloudPhotos.exe" is installed as part of the Apple iCloud client to access Apple iCloud onlineservice.

You will see the "iCloudPhotos.exe" listed on the Startup tab of msconfig.exe screen as:

Startup item: iCloud for Windows
Manufacture: Apple Inc.
Command: C:\Program Files (x86)\Common Files\Apple\Internet Services\iCloudPhotos.exe
Location: HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run 

Program file information about "iCloudPhotos.exe":

File name: iCloudPhotos.exe
File path: C:\Program Files (x86)\Common Files\Apple\Internet Services
File size: 356,664 bytes
Last modified time: Tuesday, ‎May ‎09, ‎2017, ‏‎4:55:38 AM
File description: iCloud Photo Stream
File version: 6.0.0.0
Company name: Apple Inc.

It is recommended to disable "iCloud for Windows - iCloudPhotos.exe" startup program. You can run it whenever needed.

⇒ "iCloud for Windows - iCloudServices.exe" Startup Program

⇐ "iCloud for Windows - iCloudDrive.exe" Startup Program

⇑ Application Startup Programs on Windows 7

⇑⇑ Windows 7 Startup Programs