probably the debugger might not have access to c:\windows directory.
Maybe running the IDE as admin might help.
Also, for the Microsoft dlls (like msvcr dlls), you might need to connect to the Microsft Symbol server. Read more about it here : Debugging with Symbols (Windows)
Using a Symbol Server - Windows 10 hardware dev
So basically the system needs to know a location where it can download the symbols from the MS server as and when needed (like symbol would be downloaded on need basis, not just for all dlls.) and the debugger needs to know this location so that while debugging, it can pick up the symbols for MS dlls. this is how i remember it used to be . hope its same still :).
google out more for how to use symbol server.