Hi Perry,
        It looks like the references are to America On Line Instant Messenger
(AIM), which you may have gotten with Netscape 4x.
        If you don't need AIM, you might try deleting it from Windows Explorer
(I don't think it shows up in Add/Remove Programs, at least it didn't on
my computer).  You will find it in your Netscape folders, and also in
your Netscape Bookmarks.  After deleting it from Explorer and after
deleting the Bookmark, reboot and run Regclean again.  That should
eliminate the problem.
        On the other hand, if you do like AIM, someone else will hopefully have
a solution that will allow you to keep AIM without the Regclean problem.

                                        Terry L. Clark
                                        [log in to unmask]
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Perry Tan wrote:

> Every time I reboot the computer, and run  Regclean 4.1a , it suggests
> Fixed Error.
>
> Notepad reveals the following in every undo file.
> I don't understand why regclean cannot remove those registry entries > once and for all or the meaning of those Undo registry values.

> -----------------------------------------------------
> REGEDIT4
>
> ;    Double click on this file from Explorer to automatically
> ;    undo these deletions or modifications and return the values to
> ;    the registry.
>
> ;    - Modified or removed by RegClean 4.1-a (7364.0001) from computer:
> MAINCOMPUTER
> ;      on Wednesday, July 15, 1998 00:46:42
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\aimfile\shell]
> @="2450873.6824280AB412D67B737A37D5C0B146A8B888878"
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\aimfile\shell\open]
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\aimfile\shell\open\command]
>
> [HKEY_LOCAL_MACHINE\SOFTWARE\Classes\aimfile\DefaultIcon]
> @=",0"
> ---------------------------------------------