I receive the message that a schedule update is currently running when attempting to open Quicken.

pmalay

Scheduled update never seems to end as I get the message even after 8-9 hours or even a day. It seems that the schedule update never completes. I have to kill the process from task manager to be able to open my Quicken. Anyone else running into this issue?

NotACPA

I'm not.

Try initiating the downloads manually one-by-one, from within Q, to see if you can identity a troublesome account.