Visual Studio 2015 - Extension Error

Question

Whenever I open my Visual Studio 2015, give me this message:

This is the log that the message points to:

ERROR Extension will not be Loaded because an Extension with the same ID 'Microsoft.Windows.Developmentkit.Desktop' is already Loaded at C: PROGRAM FILES (X86) COMMON FILES MICROSOFT EXTENSIONMANAGER EXTENSIONS MICROSOFT WINDOWS KITS 10 DESKTOP SDK... C: PROGRAM FILES (X86) COMMON FILES MICROSOFT EXTENSIONMANAGER EXTENSIONS MICROSOFT WINDOWS KITS 8.1 DESKTOP SDK Extension Manager 2017/07/07 12:28:02.937 526 ERROR Extension will not be Loaded because an Extension with the same ID 'Microsoft.Windows.Developmentkit.Windowsstore' is already Loaded AT C: PROGRAM FILES (X86) COMMON FILES MICROSOFT EXTENSIONMANAGER EXTENSIONS MICROSOFT WINDOWS KITS 10 WINDOWS STORE SDK... C: PROGRAM FILES (X86) COMMON FILES MICROSOFT EXTENSIONMANAGER EXTENSIONS MICROSOFT WINDOWS KITS 8.1 WINDOWS STORE SDK Extension Manager 2017/07/07 12:28:02.937 527 ERROR Error updating the Registry for incompatible Extensions. Exception: A task was canceled. Extension Manager

Answer 1

For some reason, an extension has been installed more than once.

This seems to be a common problem. The most comprehensive solution I found is in the English OS. Disregards the tag used there, because the problem is the VS and not the language. Here is a translation:

• Go to the control panel;
• Select the Visual Studio;
• Select the options to change/modify, until you reach the window where you can modify Visual Studio extensions;
• Use the dialog to remove conflicting extensions. In the specific case of this question, development kits for desktop and to Windows Store, because both presented conflicts (not the first conflicting with the second - are really two mistakes).
• Confirm all and restart the computer.

If this does not resolve, you may need to uninstall other extensions.

If Visual Studio opens correctly after these steps, you can try installing the extensions again by following the same steps above.