First let's have a look to see if that shell menu handler is registered properly.
Copy the contents of the code box to notepad.
Nane the file link.bat
Save as Type: All files
Code:
echo Querying HKCR\CLSID\{37ea3a21-7493-4208-a011-7f9ea79ce9f5} >results.txt
reg query HKCR\CLSID\{37ea3a21-7493-4208-a011-7f9ea79ce9f5} /s >>results.txt 2>&1
echo.>>results.txt
echo Querying HKEY_CLASSES_ROOT\lnkfile\shellex\ContextMenuHandlers\OpenContainingFolderMenu >>results.txt
reg query HKEY_CLASSES_ROOT\lnkfile\shellex\ContextMenuHandlers\OpenContainingFolderMenu /s >>results.txt 2>&1
Start results.txt
exit
Double click on link.bat to run it.
When finished, a file named results.txt will open. Post the contents of results.txt into your next reply here,please.
We'll take it from there.