Windows 10: When will windows 10 delete windows old folder

Not even close, I build my own PCs and also upgrade them changing the boot drive and so on.
And yes I looked at the system partitions after the Windows 10 migration and both the Healthy recovery partitions were there as to be expected as in the initial windows 10 state reversion to Windows 8.1 was still a potential.

But after a Systems Disk Cleanup in which all the transition files were removed, both "Healthy Recovery Partitions" were still there.

So either one step was omitted by MS in the cleanup or it was purposeful so that this kept a record of the fact that this was an upgrade from Windows 8.1 or so that a chain of UUID's were preserved.

My other PC that was originally a clean install of 8.1 on a pristine hard drive and has the same two "Healthy Recovery Partitions" and again the file dates match the install of 8.1 and of 10.

If the Windows 8.1 "Healthy Recovery Partition" had been superfluous I would have deleted the partition and left the trim space a little larger.

 

Without system specs it is hard to guess something that would be a little bit close.

The system disk cleanup utility only cleans for that partition.
The Recovery partitions are outside of that partition.

 

That is an assumption for which you have no grounds. For the particular case of the windows 8.1 to windows 10 that was almost certainly changed.

In any case you have added no information to the discussion.

 

To be honest, you haven't either added something that has to do with this thread as this discussion is off topic of the thread.
I'm just trying to help you to determine where that recovery partition is coming from *Smile