I thought I disabled the windows startup delay using the setting in Opus but I was still having a slow experience when logging into my PC. I followed the instructions here: https://www.elevenforum.com/t/enable-or-disable-delay-of-running-startup-apps-in-windows-11.9144/
and found that the Serialize key wasn't created under Explorer. I created they key and then added the needed dword and set it to 0 and now all is good. I'm not sure if this is the setting Opus modifies but it seemed to fix my issue.
I'm wondering if this setting is broken in the current beta. Thanks!