you have to enable this first: https://forums.mydigitallife.net/threads/windows-10-disk-cleanup-warning.79007/#post-1502489
UGHHH ya I would never have clicked that. good call letting everyone know about it. that's for very specific things. not for playing with.
I'm pretty sure the Windows development team makes so much money they just sit around doing hookers and blow all day and night. "Hey guys, let's make it so people delete their Download folder and compress their entire drive in disk cleanup. Wouldn't that be funny!"
I always do about 32% for windows. regardless of full size. then backups. don't bother confusing it with 33.33333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333333 you will get in trouble.
they need a BIll Gates wall through to wake their asses up he's not in charge but he can waltz in there if he feels like it. he's probably say something like Apple products will work over Microsoft's dead body.
then let's talk about Windows Driver Foundation. because I think that is the issue. I had loginui error with this. something about Windows Hello? I'm not good with powershell but I can show you with a command I don't think this should be exclusively a virtual machine forum or thread. I shouldn't have to go to hardware with this.
AFAIK only if "Compress this drive to save disk spaced" is checked in Local Disk (C: (or whatever else drive)) Properties and accessed already, it will appear in Disk Cleanup for (C: (or another drive))! If the Option is pre-checked already on a newly installed Windows OS, simply means that the used Install ISO isn't in an original stage. Such could happen while using a home build or whatever ISO which was modified with changes to the installation to result in different standard settings of the OS. In an original ISO, compressing of a Disk will never be set to active stage, it will be unchecked at all times.
I have my File Explorer stripped down to a minimal view so I don't use any of those add on entries in the nav pane. I keep a secondary drive dedicated to my files. I can reload Windows on the system drive without doing anything at all in terms of backups, everything is on my secondary drive. Then that drive is mirrored to a backup drive. So there's nothing Windows can do to the system drive that can mess me up. Been handling my data that way for a long time and it's saved me a few times over the years. In the early days it wasn't uncommon for Windows to blow up for no apparent reason. Those of us that used Windows before NT can appreciate how far it's come in terms of reliability. Though offering to blow away the contents in an area normally assigned to user data is not very good practice.