VS2015 Error List Items All Doubled

Question

In VS2015, I am working on my own C ++, if that matters, all warnings in the error list are doubled. I know that headers will be included several times, but I see that the element for the .cpp file is specified twice with the same line number and identical contents.

I disabled any extensions I can, and the filter option is set to Build Only (also not displaying Intellisence errors). (The only thing I found in web search was for different projects where different tools found an error)

I do not know where else to look for what causes it.

, . Qt *.ui, CL . , , , - .

. , .

Answer 1

, ++ ( Qt). "File" -> "New" -> "Project" -> "Visual C++" -> "Empty Project" ++ . .

int main() {
  long a = 1;
  float b = a;
}

- , reset Visual Studio: "Tools" -> "Import and Export Settings Wizard" -> "Reset all settings" -> "No, just reset settings, overwriting my current settings". , / ( , /, ), , ). , , , Visual Studio : : .. WPF-, XAML, .

Answer 2

, , MSBuild Normal, Minimal. , , : ... ... ... ... MSBuild build build output length: Minimal.

Answer 3

, " " , Intellisense.

, , . "Build + Intellisense". " " " Intellisense".