I updated the host with zypper dup. As for the guest, I can't seem to complete the update before it crashes. I start downloading and installing the updates, then I leave it working, and when I go to check back, it has already rebooted. Anyway, I'm pretty sure no version of Window 10 with or without the latest updates installed, BSODs every two minutes like this. It's obviously a VirtualBox issue. I already reported it to VirtualBox, but they said I'm using OpenSUSE's fork and told me to "try the official version".