Solving error 800488fe once again
In July of last year, a number of users found they couldn’t sign into Messenger and were receiving error code 800488fe. This appears to have started again today and additionally, you might have gotten an “Unusual sign-in activity” message like the following:
This would seem suspicious normally, but the IP address shown is actually the users real IP, so it seems to be a false positive and can be dismissed. You can always check your account activity to verify this.
I’ve received this message myself in the last few hours on an account I only use for e-mail and never Messenger – so it seems Microsoft is having trouble with their security detection.
Like before, to solve the problem, just sign into Outlook.com with your Messenger Microsoft account (which may or may not require you do extra account verification) and then you should be able to sign into Messenger again.