Visual-studio – NuGet upgrade issue

nugetvisual studiovisual studio 2010

I have the version of NuGet that comes with MVC3 (1.0), but when I try to upgrade to the latest version (currently 1.4) it failes and I get this in the log file:

6/27/2011 1:25:08 PM – VSIXInstaller.SignatureMismatchException: The installed version of 'NuGet Package Manager' is signed, but the update version has an invalid signature. Therefore, Extension Manager cannot install the update.
at VSIXInstaller.Common.VerifyMatchingExtensionSignatures(IInstalledExtension installedExtension, IInstallableExtension updateExtension)
at VSIXInstaller.InstallProgressPage.BeginInstallVSIX(SupportedVSSKU targetAppID)

6/27/2011 1:25:08 PM – Install Error : VSIXInstaller.SignatureMismatchException: The installed version of 'NuGet Package Manager' is signed, but the update version has an invalid signature. Therefore, Extension Manager cannot install the update.
at VSIXInstaller.Common.VerifyMatchingExtensionSignatures(IInstalledExtension installedExtension, IInstallableExtension updateExtension)
at VSIXInstaller.InstallProgressPage.BeginInstallVSIX(SupportedVSSKU targetAppID)

6/27/2011 1:26:27 PM – VSIXInstaller.SignatureMismatchException: The installed version of 'NuGet Package Manager' is signed, but the update version has an invalid signature. Therefore, Extension Manager cannot install the update.
at VSIXInstaller.Common.VerifyMatchingExtensionSignatures(IInstalledExtension installedExtension, IInstallableExtension updateExtension)
at VSIXInstaller.InstallProgressPage.BeginInstallVSIX(SupportedVSSKU targetAppID)

I even tried uninstalling NuGet (via Add or Remove Programs) and installing 1.4 manually, but I inexplicably get the same message. Any idea what I'm doing wrong?

Best Answer

  1. Close all visual studio 2010 instances.
  2. Open visual studio again as administrator
  3. Go to "Tools" > "Extension Manager"
  4. Uninstall NuGet
  5. Install NuGet again.

if you are not able to uninstall it go to:

C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\Extensions\Microsoft Corporation\NuGet Package Manager

and remove this folder. deleting this is at your own risk!

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