Hi, We are experiencing a problem where any .NET (2.0) application run on a particular machine causes a crash. We see the following two messages in the Application event log: '.NET Runtime version 2.0.50727.832 - Fatal Execution Engine Error (7A0592A2) (80131506)' 'Faulting application dfsvc.exe, version 2.0.50727.1433, stamp 471ebf7e, faulting module mscorwks.dll, version 2.0.50727.1433, stamp 471ef729, debug? 0, fault address 0x000dff9d.' Our main application is a clickonce application. When the user clicks on a link to launch it, they get the message 'dfsvc.exe has encountered a problem and needs to close...'. I tried launching 3 very simple ClickOnce applications, one unsigned, one signed, and one signed and configured to install. All three failed. Then I tried running two very simple .NET applications directly on the machine (not clickonce), one console application, one WinForms application. Both failed with similar error messages. The user has tried completely uninstalling all versions of the Framework and reinstalling 2.0, but that did not correct the problem. So, apparently, something seems to have corrupted the .NET environment such that even removing and installing the framework doesn't fix it. Any ideas? Thanks, Luke Wright Projector PSA, Inc.