WampServer

Yeah I have used the username root and a blank password, though I did change the password so that it wasn't blank because I was worried about insecurity. I have created two new users, an 'admin' user and a 'usage' user but because I can't quit without the monitor closing complety I dont know how to change users. I thought that I would be asked for my user name as well as my password whenever I opened the Monitor but it just asks for the password (which is for the root). Have I made a mistake in installation?
Thanks for your help by the way

This is repost.
Anyway, to set password, check this post
[forum.wampserver.com]
Hope this help.