When you try to log into SSRS\'s root site at http:// (servername)/Reports it displays:
User \'\' does not have required permissions. Verify that sufficient permissi
I had the same problem on my Windows 8 system (32 bit) with SQL Server 2008R2. When I started IE using 'run as Administrator' it still asked for a user name and password and resulted in "user does not have permissions"-error when I entered my user name and password. This is what fixed it for me:
I disabled UAC in the registry (Set HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA to 0). I first set notify-level under Control Panel | System and Security | Change User Account Control to the lowest level but that didn't make any difference.
After reboot I started IE using 'run as Administrator'. Went to Report Manager | Site Settings | Security: added my account as System administrator.
Still in Report Manager I went to Home | Folder Settings and added my account with role Content Manager.
I enabled UAC through Control Panel | System and Security | Change User Account Control settings by setting it to default level again. (Reboot required)
When I run IE as Administrator now and supply my user name and password it does show the homepage of the report manager.