Problem Running Windows Media Services service Stefan 11/18/2008 11:15:02 AM Hi, I'm having trouble with the Windows Media Services service an was hoping that someone could help me out. Currently I am developing an application that interacts with the service and have been at development for the past couple of months and am not having issues with regard to the interaction. This morning, on logging into the test machine running Server 2003, the maching complained that a service has failed to start up. Upon inspection, it turns out to be the Windows Media Services service that is failing. The error produced is as follows: In the System Event Log: “The Windows Media Services service terminated with service-specific error 2147942487 (0x80070057).” In the Application Event Log: “The application-specific access security descriptor for the COM Server application C:\WINDOWS\system32\Windows Media\Server\WMServer.exe is invalid. It contains Access Control Entries with permissions that are invalid. The requested action was therefore not performed. This security permission can be corrected using the Component Services administrative tool.” I had a look on the internet and found the following article: http://support.microsoft.com/kb/829393/ This is a description of seemingly exactly the problem I am experiencing at the moment. I am however unable to locate a download for the specific hotfix listed there. Hoping that the fix would have been included in SP2, I proceeded to install service pack 2, with no success. After some additional searches, I located an article specifying that the relevant hotfix was present in service pack 3 for Framework 1.0. I downloaded this and installed it along with the service pack to no avail. In the end I have searched for a solution extensively. I have installed/uninstalled Media Services several times, along with installing and uninstalling various .NET frameworks and nothing seems to be helping. I tried forcing the service to also run under the local system account, to no avail. I can bypass the problem by just utilizing the development environment, which is an exact replica that is still working fine, but that still doesn't solve the issue in the long run. Can anybody help? Your help would be greatly appreciated.