I'd like to create user account in Qlikview (I have a license for 100 users), but for now all users can access the same account. thank you for giving me the proper procedure to follow.
If you mean a custom user, follow the procedure here: http://community.qlik.com/forums/t/24005.aspx. Otherwise, if you're using NTFS mode and want to integrate with Windows authentication, you can restrict access using NTFS permissions on the file.