He won't be allowed to perform at Eurovision with the Windows 95 name/trademark/logo, so it would be hilarious if he switches to a name like Linuxman during it.
It's still unclear if he's allowed to use the logo and such. The national broadcaster Yle (which itself has a strict policy against advertising) allowed it in the national show and argued that (quote) "Windows 95 is no longer a protected trademark today. The product is hardly used by anyone anymore. Thus the name and the costume are allowed"