Update install_msvc.md

Author: TimGoTheCreator

docs/install_msvc.md

@@ -42,9 +42,14 @@ cd ..
 ```powershell
 cd examples/TwoBodies
 python two_body.py
-..\..\next.exe two_body.txt 8 0.01 0.1 vtu
 ```
 
+#### If the copy command worked (copies to project root by default in CMake):
+../../next.exe two_body.txt 8 0.001 0.1 vtu
+
+#### If your executable is in build/
+../../build/Release/next.exe two_body.txt 8 0.001 0.1 vtu
+
 5. **View results**
 
 Open the `.vtu` output in ParaView.