Windows 11 takes long to boot

My PC takes between 60-80 seconds before the Windows logo comes up. I created a Process Monitor logfile and in there were a dozen entries with Result=CANCELLED which had duration of 3 to 17 seconds. The one taking 17.8 seconds was trying to access a file, "C:\Users\Public\AccountPictures\S-1-5-21-3415986207-50523673-2978598619-1001\{F0230BAE-7D60-44C0-B949-B0EF3DE3E0FF}-Image192.jpg" which does not exist. It does exist in "C:\Users\Public\Public AccountPictures\" so there is a mismatch in my system. I clean installed Windows 11 two years ago and have installed all upgrades and that's what's be done to the system. As for the other long duration entries they all exist i the C:\windows\system32\config folder. What's the problem with my system and what can I do to fix it?

I searched the registry for one of the file names and found
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AccountPicture\Users\S-1-5-21-3415986207-50523673-2978598619-1001 so the registry points to the wrong folder. Folder AccountPicture dos not exist in my system, it's called Public AccountPictures.

In this video, we delve into the common issue of slow boot times in Windows and how to effectively troubleshoot it using Process Monitor.

I suspect that boot is slow because lots of registry files point to locations of files which are no longer valid. Perhaps you have been deleting programs without doing a proper uninstall? I would make a complete image backup with Macrium Reflect (paid) or Hasleo (free) and then run Cleaner to chech and fix registry errors. Cleaner will offer to create a restore point and a registry backup but these steps are not needed if you have a complete image of your system.