Microsoft expired the update KB977724, Update for the 2007 Microsoft Office System, after the complaints from customers using Windows Server 2008 R2, and Windows Server 2008 with Terminal Services have reported experiencing crashes with Office apps after installing 977724, which’s a non-security update that allows support of .NET 4.0 components within the Office 2007 system. The crash symptoms aren’t caused by the .NET 4.0 compatibility changes. KB980210 supersedes KB972224, explains Microsoft. A hotfix is available to addresses these crashes. It isn’t necessary to uninstall KB977724 before installing this hotfix.