From what I've read, loader.exe isn't part of WLM, but may be malware.
http://groups.google.com/groups/search?q=loader.exe&qt_s=Search
Your a/v software might have deleted the malware, but a reference to it
still exists in the registry, or wherever it's loaded. If in the registry:
Click Start, Run, type REGEDIT, click OK. Press the Home key, press F3,
type the name of the file into the search pane. Click "Find Next", and
when located, delete the reference to the file. Press F3 to continue
the search.
You can click File, Export, and save the entry to the Desktop. If you
remove it and there's a problem, double-click the .reg file you exported
to the Desktop and it'll be added to the registry again. You can create
a restore point before editing the registry too.