Problem: When this error happens, it means that the Visual Studio Installer is updating some extentions you installed along with Visual Studio
Solution: Do not just open up Task Manager and Kill all processes that VSXAutoUpdate.exe is updating, this will give you problems when you try to start Visual Studio as updates were not complete. Instead, Wait until the update completes that is when you start the Visual Studio. If you nolonger need the Visual Studio Component that is updating more regularly, again it is advised to uninstall the component via Visual Studio Installer.