无法在Visual Studio 2010 Express中创建任何项目

我最近从Microsoft网站下载了VSExpress.iso并进行了安装.我遇到了一些问题，因此我卸载了整个安装程序，然后重新安装了它，包括.net 4.

I recently downloaded the VSExpress.iso from the microsoft site and installed it. I had a few problems so I uninstalled the entire setup and reinstalled it including .net 4. 

现在我有一个新问题，我似乎无法在其中启动任何新项目.当我第一次启动它时，它给了我一个错误，说与"ActivityLog.xml not found"有关.但我忽略了它.但是现在在创建项目时，它给了我 并说"

Now I have a new problem, I cannot seem to be able to start any new projects in that. When I started it the first time it gave me an error saying something related to "ActivityLog.xml not found" but I ignored it. But now while creating project it gives me and error saying, "No valid exports were found that match the constraint 

AndAlso(exportDefinition.Metadata.ContainsKey("ExportTypeIdentity"))
还有"Microsoft.VisualStudio.Text.ITextBufferFactoryService" .Equals(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))))'
，则无效的出口可能已被拒绝."

'((exportDefinition.ContractName == "Microsoft.VisualStudio.Text.ITextBufferFactoryService") 
AndAlso (exportDefinition.Metadata.ContainsKey("ExportTypeIdentity") 
AndAlso "Microsoft.VisualStudio.Text.ITextBufferFactoryService".Equals(exportDefinition.Metadata.get_Item("ExportTypeIdentity"))))'
, invalid exports may have been rejected."

Please help me with this. I have tried uninstalling, reinstalling, Installing sp1, and searching the web... But none related to this gave me a solution to this problem.

谢谢您的帮助...:)

Thank you for the help in advance...:)