Windows 11 desktop background slideshow interval

Windows 11’s default background slideshow (Settings → Personalization → Background → Slideshow) exposes only six rotation frequencies:

• 1 minute
• 10 minutes
• 30 minutes
• 1 hour
• 6 hours
• 1 day

while the legacy background chooser, still accessible via shell:::{ED834ED6-4B5A-4bfe-8F11-A626DCB6A921} -Microsoft.Personalization\pageWallpaper, offers 16:

• 10 seconds
• 30 seconds
• 1 minute
• 3 minutes
• 5 minutes
• 10 minutes
• 15 minutes
• 20 minutes
• 30 minutes
• 1 hour
• 2 hours
• 3 hours
• 4 hours
• 6 hours
• 12 hours
• 1 day

Even finer control may be possible in HKEY_CURRENT_USER\Control Panel\Personalization\Desktop Slideshow, though intervals <20s are reportedly unreliable.

❧ 2025-08-16