Struggling with SSRS 2008 Error rsAccessedDenied on Win7

After successfully deploying a RDL report definition to SSRS 2008 running on Win7, I tried to browse the Report Server web under http://localhost/ReportServer but was greeted by the error message

Die dem Benutzer ‘machine\username’ erteilten Berechtigungen reichen zum Ausführen des Vorgangs nicht aus. (rsAccessDenied)

The permissions granted to user ‘machine\username’ are insufficient for performing this operation. (rsAccessDenied)

Navigating to the Report Manager under http://localhost/Reports/Pages/Folder.aspx gave me the message

Der Benutzer ‘machine\username’ verfügt nicht über die erforderlichen Berechtigungen. Stellen Sie sicher, dass ausreichende Berechtigungen erteilt und die Einschränkungen der Windows-Benutzerkontensteuerung (UAC) behandelt wurden.

User ‘machine\username’ does not have required permissions. Verify that sufficient permissions have been granted and Windows User Account Control (UAC) restrictions have been addressed.

Of course, the suggested Online “help” had not only no useful information, but really contained *nothing*at*all*.

I found this blog on rcAccessedDenied but at first could not really figure out what it meant. Especially since the described workaround (run browser as administrator, also mentioned by an illustrated DBA tip) did not work for me. At least, I figured out that I needed a “real” administrator account to proceed.

So I started Control Panel, Computer Administration, Local Users and Groups and double-click the Administrator account. I activated the account and set a password.

After this, I managed to log in to the Report Server web using the Administrator’s credentials. There I could assign roles to my usual Windows user, but the user was still unable to connect to both sites.

Using the Administrator login I could at least grant rights to browse the data sources folder under http://localhost/Reports/Pages/Folder.aspx?ItemPath=%2fData+Sources&ViewMode=List and the deployed reports under http://localhost/Reports/Pages/Folder.aspx?ItemPath=%2f[SolutionName]&ViewMode=List.

By the way, I tried running the browser as administrator on another computer (SQL Server 2012, SSRS, Win7) and was immediately able to browse the Reports/Pages/Folder.aspx. I really have no idea what’s going on here 😦