We upgraded all of our servers to 4.5 and we're having occasional Application Errors that are starting to get annoying. I'm wondering if we have things locked down too much. Can anyone point me at a document that lists directories on a server and what permissons a user needs to have. Thanks a ton! ERROR MESSAGE DETAILS: The two applications that are killing us the most are wfcrun32.exe (Program Neighborhood Connection Center) and Explorer.exe - Connections Tray. The error message is: The instruction at "0x749ae5b3" referenced memory at "0x00000048". The memory could not be "read". We're running a combination of the 10.1 and 10.1.5 client. Both servers get the errors. Jay