That sentence is the entire message for thousands of people who paste it into a search box verbatim, so here it is answered directly: a program on the PC ran into a fatal problem, called the Microsoft Visual C++ runtime's emergency exit (the technical term is abort()), and Windows closed it. “Unusual way” = the program gave up instead of handling its error. The program is broken or its support files are — Windows is only reporting it.
The dialog names a program path (something like C:\Program Files\...\app.exe) above the sentence. That program — not Windows, not “the Runtime” as a separate thing — is what needs fixing. If the path scrolled past, the dialog's title bar and the Event Viewer (Windows Logs → Application, at the same time) both record it.
msconfig → hide Microsoft services → disable the rest and startup items) to rule out another program interfering.If every fix fails and the abort names a program that used to work, check Event Viewer for the faulting module name. A module belonging to a different product (security software, overlays, old shell extensions) means that product is the culprit — update or remove it. If the module is the program's own and a clean reinstall didn't help, the maker's support channel needs the Event Viewer entry; it's the diagnosis in one screenshot.
Related: the general Microsoft Visual C++ Runtime Library error page covers the same family with the full repair walkthrough.
Is “the Runtime” a program that needs reinstalling? Not separately. The runtime is a set of shared Microsoft libraries (the Visual C++ Redistributables). Repairing them in Settings → Apps is the reinstall.
Why does it say “unusual way”? Programs normally exit through orderly shutdown paths. This one invoked the emergency abort in the C++ runtime, which the runtime reports with that exact sentence.