I hate to chime in with just a "me too", but, well, me too.
I get two "C:\Documents and Settings\All Users\Start Menu\Programs" windows if I use CTRL+ALT+DEL to lock my screen.
I'm also annoyed that Impulse is bundled in. I like Impulse at home, but Fences (for me) is filling a very useful niche on a work machine and Impulse doesn't belong here. The fact that I can uninstall Impulse but keep Fences means that Impulse obviously doesn't have to be there. This should be a checkbox during the install - even if the check defaults to "Yes".
[Edit] I should add that these two windows have popped up twice now while I was actively using the computer, but I have no idea what's triggered that behavior.