The fact that there are 14 ways to fix the Calculator app listed in this article, including even "Disable Windows Firewall temporarily", is simply beyond any sort of rant.
Somewhat off-topic, listened recently to Computers Barely Work - Interview with Linux Legend Greg Kroah-Hartman [2] and, as hubristic and cliché as it is, the takeaway was: we must delete every software, destroy every CPU ever made, and start all over again.
[1] https://www.howto-connect.com/fix-calculator-not-working-in-... (edit: other links about fixing the Calculator app, https://www.groovypost.com/howto/calculator-app-not-working-..., https://appuals.com/calculator-not-working-windows — the fact that these SEO spam sites exist is also a problem, an app as trivial as a calculator should have one single, self-evident button for the end user to click and fix it, whatever that might imply)