Visual Studio Just In Time Debugger is a good tool but it becomes very irritating when it crashes other applications.
To disable it, here is the procedure
1. On the Tools menu, click Options.
2. In the Options dialog box, select the Debugging folder.
3. In the Debugging folder, select the Just-In-Time page.
4. In the Enable Just-In-Time debugging of these types of code box, select or clear the relevant program types: Managed, Native, or Script.
To disable Just-In-Time debugging, once it has been enabled, you must be running with Administrator privileges. Enabling Just-In-Time debugging sets a registry key, and Administrator privileges are required to change that key.(If you are using Windows Vista, right click on Visual Studio and click run as an administrator for running it)
5. Click OK.