Just signed in to say after uninstalling Kaspersky everything started working again for me.
I was having issues with Microsoft Store, Xbox app and Phone Link.
After uninstalling Kaspersky everything started working again.
I only had 27 days left on my Kaspersky subscription and was intending to renew, but after this experience I won't be renewing my Kaspersky protection.
A week ago I would've recommended Kaspersky to anyone who asked but after this and reading this thread and what OP had to go through, there's not a chance I'd recommend Kaspersky.
Do better.