Something that caught me out recently.
Rosetta now has some "rosetta python projects" which use vbox.
https://boinc.bakerlab.org/rosetta/server_status.php
And if you have had any issues with vbox in the past and do not want to receive these tasks, you have to dig deep into the Rosetta website to prevent your host(s) from receiving them.
Usually, one would do this by going to "Your account" on the Rosetta website and clicking on "Rosetta@home preferences" - but this doesn't work as there are no application options here.

Instead you have to go to "view" Computers on this account and then for EACH host, you have to click on "Details" and at the bottom of each screen (for each host) there is a "Disallow" VirtualBox VM jobs option.
I don't know why they have chosen this route - most other project websites allow you to change the apps on the "Preferences" section and then you can add/remove hosts from home/work/school locations which gives you more control to run specific applications on specific hosts.
regards
Tim