upgrading sql server 2008 to SP2 breaks reports

After upgrading an instacne of sql server 2008 to SP2, I noticed that non of the reports from the management studio are accessable. including the reports that I frequently look at under the Management Data Warehouse.

The error message I was getting was;

The file 'Microsoft.ReportViewer.WinForms, version=9.0.0.0, Calture=neutral, publicKeyToken=b03xxxxxxx' cannot
be opened. Do you want to remove the reference to it from the Recent list?

In order to solve this, you need to download and install the Reporting Services Report Viewer 9.0 available from the following link;

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=6ae0aa19-3e6c-474c-9d57-05b2347456b1


installation was very quick and did not require any restart.