Can't chcange folder name 9r1¤ŰܸŢ.╩5

Which folder are these awkward folders inside? [I suggest you post the full folder paths]
Can you clear out everything else within that parent folder & within the awkward folders themselves?

If you can clear everything else out then you can get rid of them.
1 First of all, as you do not know why they ended up with those strange names, I suggest you run ChkDsk - Drive Error Checking - TenForumsTutorials
2 Then you can clear out the rogue folders using this procedure - my ditty about using RoboCopy to clear out a rogue file - TenForums
I appreciate that you will want to ask questions before proceeding.

Best of luck,
Denis

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Maybe using wild card and 8 character limit at a command prompt would help:

Open a command-prompt window (click the “Start” button then type “cmd”)
Navigate to the folder that contains the offending folder (type “cd temp\foldername\whatever”)
Rename the file or folder using the Win95/DOS long-file name format; let’s pretend it’s called “invalidfilename ” (ren invali~1 goodname)
Delete the folder (rd goodname)

You may have to do that by booting to a command prompt.

I've seen mention of using 7-zip to handle items with special characters, but don't know if that would be relevant here.

Thank you for your reply. (?)