I'm using the R51.12 with Windows 11. I think it started within the last week.
At first I thought it was a one step update issue until I started unchecking boxes. That's when I realized that it wasn't a transaction download or Quicken Cloud or update bills issue. They all go through fine when "download quotes and investment information" is not checked.
Checking the quotes leads to the program to stop responding until you close it out. I've waited for half an hour on it to start responding again, to no effect.