Fixes default per-user install precompiling the standard library.

Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp

@@ -303,9 +303,16 @@ class PythonBootstrapperApplication : public CBalBaseBootstrapperApplication {
         case ID_INSTALL_JUST_FOR_ME_BUTTON:
             SavePageSettings();
 
+            if (!QueryElevateForCrtInstall()) {
+                break;
+            }
+
             hr = _engine->SetVariableNumeric(L"InstallAllUsers", 0);
             ExitOnFailure(hr, L"Failed to set install scope");
 
+            hr = _engine->SetVariableNumeric(L"CompileAll", 0);
+            ExitOnFailure(hr, L"Failed to unset CompileAll");
+
             hr = BalGetStringVariable(L"DefaultJustForMeTargetDir", &defaultDir);
             BalExitOnFailure(hr, "Failed to get the default per-user install directory");
 
@@ -320,10 +327,6 @@ class PythonBootstrapperApplication : public CBalBaseBootstrapperApplication {
             ReleaseStr(targetDir);
             BalExitOnFailure(hr, "Failed to set install target directory");
 
-            if (!QueryElevateForCrtInstall()) {
-                break;
-            }
-
             OnPlan(BOOTSTRAPPER_ACTION_INSTALL);
             break;