August 9th, 2009

Microsoft .NET Framework 4.0 Beta 1 should be removed before upgrading to Windows 7

Heath Stewart
Principal Software Engineer

If you have been beta testing Microsoft .NET Framework 4.0 Beta 1, we recommend you install a fresh copy of Windows 7 on your machine. Alternatively, you may also choose to uninstall Visual Studio 2010 Beta 1 and .NET 4.0 Beta 1 prior to upgrading to Win7.

Microsoft Windows 7 is available to MSDN and TechNet subscribers.

Problem

If you have installed .NET Framework 4.0 Beta 1 on your Windows Vista machine, after upgrading to Windows 7 you may encounter some problems. Managed code may not function, especially applications built to target .NET 4.0 Beta 1. Also, if you have any ClickOnce applications installed, Windows Explorer may crash continuously when you log in.

Status

This issue has been fixed in .NET Framework 4.0 Beta 2.

Author

Heath Stewart
Principal Software Engineer

Heath is an application architect and developer, looking to help educate others to learn professional development. Besides designing and developing applications he enjoys writing about intermediate and advanced topics. Heath also consults for deployment packages and scenarios within Microsoft and for external customers.

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