Beware of the sticky files syndrome

)))
Once I copied some AMIGA files into a windows folder from a AMIGA CD backup I did and some of them couldn't be later removed by Windows !
Thats true! I think it was some MUI files ...
How did i managed to delete them ? I didnt

I had a PC hard disk corruption later (by other reasons, not related to winuae surelly) so ALL the files were gone ;-)