This forum supports windows desktop Hyper-V. Some of these may be helpful
https://forums.virtualbox.org/search.php?keywords=err_invalid_name+-104&sid=b8decd98ea047324f71f6fee76b5f7e0
VirtualBox is not a microsoft product I'd suggest reaching out to subject matter experts here in dedicated forums.
https://forums.virtualbox.org/
--please don't forget to Accept as answer if the reply is helpful--