Hi Martin - From my Blog, Defending Your Machine, addy in Signature below:
"Sometimes the tools below will find files which they are unable to delete
because they are in use.
A program called Copylock, here,
http://noeld.com/programs.asp?cat=misc can
aid in the process of "replacing, moving, renaming or deleting one or many
files which are currently in use (e.g. system files like comctl32.dll, or
virus/trojan files.)"
Another is Killbox, here:
http://www.downloads.subratam.org/KillBox.zip
A third which is a bit different but often very useful is Delete Invalid
File, here:
http://www.purgeie.com/delinv.htm which handles invalid/UNC
file/folder name deleting, rather than the in use problem.
A fourth useful program is Unlocker, here:
.
http://ccollomb.free.fr/unlocker/ " Simply right click the folder or file
and select Unlocker. If the folder or file is locked, a window listing of
lockers will appear. Simply select the lockers and click Unlock and you are
done!" Works as advertised and is particularly helpful in identifying
malware components which are 'protecting' each other."