i waited for it to appear, then tried to browse and download files: HFS behaved normally.
and there's nothing strange with it: that dialog has nothing different from other dialogs.
How many times did you meet this problem?
Last time again on 168 Update alert,
it stop all the the send on connected users, freeze the out speed on 0k, i must kick the IP to see moving the send again by a new refreshed request. ( tested on single user Download Limit 10 slots )
Usually when i check the http root, it is blank and explorer don't want to connect the server until a new HFS start. ( this time i updated it directly before check )
if you don't update it every day it is not a problem
or i will chose no Auto update and make it manually.
my machine was very capricious until the Last windows updates
i hope it will go well now.
(a pack was refusing to install in my box, this time it take it, maybe it will help )