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.
Everything in this answer is true but don't reinstall all of SSRS thats nonsense...
Windows 8
Problem solved!
I ran into the same issue myself but with Windows 7 and SQL Server 2008. I resolved the issue following the instructions from Suresh Kumar's blog post at http://skamie.wordpress.com/2010/06/24/ssrs-and-uac/
In a nutshell here are the steps you need to take to resolve this issue:
Start your browser using 'run as Administrator'.
Navigate to the report manager and under Site Settings -> Security assign your account or the local administrators group to the System Administration role.
Then navigate to the home folder and under the security settings assign your account or the local administrators group to the Browser, Conent Manager, My Reports, Publisher and Report Builder roles.
Now you should be able to run your browser as normal and access SSRS without any issues.
Change service account type as "Network Service" in service account tab then stop and start service and run IE as Administrator.
Windows 8.1
I resolved this with help from the answer by Austin McLaughlin posted earlier. In my case I had been logged in with a local account that had administrator privileges, but attempting to http://127.0.0.1/Reports (hearinafter referred to as "the Reporting Services Manager") produced the error reported by the OP.
The key for me was that the Administrator account was disabled by default in my Windows 8.1 laptop. Note that I did not originally have Windows 8.1 Pro, so there was no "Local Users and Groups" under "Computer Management". Thus, I had to purchase the Windows 8.1 Pro Pack online from MS for $100.
At this point you should be logged in to the Report Administrator and on the Home screen. I had not been able to get this far before.
At this point you should be able to access Reporting Services Manager page, and configure reporting services further.
From Reporting Services Configuration Manager you can get to the node Report Manager Url. The URL works from this screen. Now you can use the Folder Settings to add yourself as a Content Manager, etc... Now the url will work for your user.