I am a newbie to this forum so please bear with me. I have been using CC for a month now and I have one issue that I cannot remove no matter how many times I run a fix, it is the only one that will not remove and it is starting to bug me.
Problem: Unused File Extension
(The next two entries will have descriptions in red of contained items as I do not how to get a font to show the exact characters, the parentheses are mine and the wording in between is a description of the character)
Data: .(character U with two dots above it)(square)S
Registry Key: HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.(character U with two dots above it)(square)S

As I said the fix will not remove the entry and when I use Open in Regedit, the item is not there. The closest thing to it under FileExts is:
.(character U with two dots above it)(square)(sideways M)

But this is not the same as the one showing as an issue, the last character is a sideways M instead of an S. Can anyone help me out here? I would really like to get rid of this issue but I can't find it in the registry.

Are these two of the characters: ϋ Σ ?

If so it's Greek. The square is probably the "unknown symbol" placeholder. Since Σ is "sigma", the S may be the same, but get another opinion ... I didn't even know Greek characters could be in the registry.

Hey Glenn,
Thanx for the quick reply. Yes, have 2 out of 3, just the square is missing and you identified that. If the sideways M is a sigma (greek S), then I should be able to delete that entry from the registry right? It is the only entry that matches that closely - none of the others has Greek characters. Let me know what you think.

I think it would be harmless to delete it. It's just the registration of the file type extension, not the file itself (if you actually had a file of that type). In any case, you could back it up just in case. If you then rescan with CCleaner, and it's gone, that would verify it.

What I don't understand is how it can be in HKEY_CURRENT_ USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\ without being in HKEY_CLASSES_ROOT.

Also, as I said before, I didn't know Greek characters could be in the registry. I'm assuming that if your OS was Greek, you would be Greek and would have known those symbols.

It's all greek to me,

Well damn it, somebody had to say it!