Explorer not releasing EXE files

[Kevin]

Hi,

I'm stuck on a strange behaviour of the explorer.

Using the explorer, when I copy the file \WINNT\winhelp.exe to another
folder, then I change to the folder I'm unable to delete the file
(winhelp.exe) because the explorer still has a handle open on it (sharing
violation).

I tried with serveral exe files but it only happens with very few of them.

I tried on another computer but I was unable to reproduce the problem.

Of course I checked for every virus/trojan/spyware but nothing.

The other strange thing is that when it happens, if you run another instance
of the explorer, everything is twice:
My Documents/My Computer/My Network Places/Recycle Bin/My Documents/My
Computer/My Network Places/Recycle Bin

Any idea ?

Thanks.

 

[Kevin]

Hi,

If any one else has this problem here is the solutions, I took me several
hours of investigating every dll loaded by the explorer.

The dll messing with the explorer is cmdlineext03.dll, it can be removed
using regsvr32 /u cmdlineext03.dll

No one knows really what it is or what it does, it is located in
\winnt\system32, no anti-virus/spyware software detects or removes it.

It does mess with any file you right-click in the explorer, and it leaves
the selected file open in some rare case that's how I detected it,
winhelp.exe is one of the rare file that makes it leave a file handle opened
and thus be detected.

Regards.

 

[Pegasus \(MVP\)]

Google lists almost 500 hits for cmdlineext03.dll. A superficial
examination confirms what you report.