The 'Microsoft.Data.Entity.Design.BootstrapPackage.BootstrapPackage, Microsoft.Data.Entity.Design.BootstrapPackage, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' package did not load correctly.
The problem may have been caused by a configuration change or by the installation of another extension. You can get more information by running the application together with the /log parameter on the command line, and then examining the file 'C:/Users/Administrator/AppData/Roaming/Microsoft/VisualStudio/10.0/ActivityLog.xml'.
1. uninstall VS
2. After VS uninstalls, run the following commands from an eleveated command prompt:
Run these if you're running 32-bit windows
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/VisualStudio/10.0/AutoLoadPackages/{adfc4e66-0397-11d1-9f4e-00a0c911004f} /v {7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /f
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/VisualStudio/10.0/AutoLoadPackages/{93694fa0-0397-11d1-9f4e-00a0c911004f} /v {7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /f
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/VisualStudio/10.0/Packages/{7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /va /f
Run these if you're running 64-bit windows
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Microsoft/VisualStudio/10.0/AutoLoadPackages/{adfc4e66-0397-11d1-9f4e-00a0c911004f} /v {7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /f
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Microsoft/VisualStudio/10.0/AutoLoadPackages/{93694fa0-0397-11d1-9f4e-00a0c911004f} /v {7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /f
reg delete HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/Microsoft/VisualStudio/10.0/Packages/{7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB} /va /f
3. Re-install VS (be sure to choose to install C# and/or VB langauges, otherwise the EF Designer won't be installed.