local administrator / shared file removal

From: Michael Dworkin (anonymous_at_discussions.microsoft.com)
Date: 07/19/04 

Date: Mon, 19 Jul 2004 02:32:13 -0700

I have a shared file I need to delete, I have removed all
temporary files and now they say if that doesnt work, log
on as local administrator and go to services/ How do I log
on as local administrator???