I was launching and stopping debug in visual studio really quick as I was testing something in a DLL entry point and at some point I clicked by error on "cancel" in the loading symbols window. Since then, when I launch debug, I keep having an access violation because of a "ntdll.pdb" missing.
I tried to load the symbols from Microsoft servers, but it takes ages. I would simply like to return everything back to normal, as it was before my miss-click.