Khan, first, you should have entered a username and a password during the installation. That username and password was for the QlikView services to run under. Please make sure that all QlikView services are running under a local admin user.
Second, you're getting prompted for a username and password because IE is probably not recognizing the site as a local intranet site and not carrying your users credentials over or forcing the credentials to be reentered for every site by policy setting.
You should try entering localhost and your machine name as a local intranet site and make sure you don't get prompted for credentials for sites within that zone.
You need to start my putting the Http://localhost in the local intranet site. Second the user account that you log into you computer with needs to be a member of the QlikView Administrator group. Restart all QlikView Services.
Let me know what you get after you try this.
Bill - Designated Support Engineer at Qlik If a post helps to resolve your issue, please mark the appropriate replies as CORRECT.