Hello,

the relevant ones are these:
Microsoft.Windows.ActiveDesktop: [SBI $377029D9] User settings (Registry Change, nothing done)
HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop\NoHTMLWallPaper

Microsoft.Windows.ActiveDesktop: [SBI $377029D9] User settings (Registry Change, nothing done)
HKEY_USERS\S-1-5-21-905397145-3672288762-3867875065-1001\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop\NoHTMLWallPaper

Microsoft.Windows.ActiveDesktop: [SBI $377029D9] User settings (Registry Change, nothing done)
HKEY_USERS\S-1-5-18\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop\NoHTMLWallPaper

It means that only bitmap images are permitted for wallpaper of the active desktop. If you disabled this setting then please disregard this.

The other entries are usage tracks which reappear while using the computer.