Let me explain it under my name CaptainBasculin where Basculin is a name of a pokemon. As a business, I can apply to use the name CaptainBascule or Cpt. Bass Coulin; but I cannot use Basculin if I want to register my name as a trademark to use in my products
However, I can also try to take permission from the trademark owners to use the name if I absolutely want to use Basculin on my products. For that case, there will likely be negotiated pricing for the use of the name.
you'll most likely be fine, there still exists people who use Windows 7 for that workflow. You have to be more aware of vulnerabilities that could be found on your operating system though; and over time more and more software might drop support for your OS (realistically, this will be more noticable when Windows 12-13 gets released) so you might not be able to use latest Office version's features.