Before installing Service Pack 1 for Exchange 2010 there are some updates that need to be downloaded and installed first. Service Pack 1 installation will inform you that hotfixes with their appropriate KBxxxxxx numbers should be installed. When you open the links in Microsoft’s web site, you will find out that multiple files exist and it is not quite clear what file to download. I suggest you look into this table provided by MS Team. Hotfix Download Windows Server 2008 Windows Server 2008 R2 Windows 7 & Windows Vista 979744 A .NET Framework 2.0-based Multi-AppDomain application stops responding when you run the application MSDN or Microsoft Connect Windows6.0-KB979744-x64.msu (CBS: Vista/Win2K8) Windows6.1-KB979744-x64.msu (CBS: Win7/Win2K8 R2) N. A. 983440 An ASP.NET 2.0...
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