Yep — if they’re seeing photos cycling “by themselves” (especially right after sign-in), an auto-start slideshow is a prime suspect. Here are the usual places to check in
Windows 11 / Windows 10:
1) Desktop background slideshow
- Settings → Personalization → Background
- If it’s set to Slideshow, switch to Picture (or Solid color).
2) Lock screen slideshow / Windows Spotlight
- Settings → Personalization → Lock screen
- If it’s Slideshow or Windows spotlight, change to Picture (or disable slideshow).
3) Screen saver (can look like a slideshow)
- Settings → Personalization → Lock screen → Screen saver
- Set to...