There is the
uefi tag but I feel a
windows-8 tag would be more "friendly". In any case, there are tags for Win 7 and XP.
I feel it could be useful for questions possibly arising from difficulties faced in dual-booting.
Edit: I felt quite stupid after it was pointed out that the windows-8 tag exists. But these two images may explain why I thought it didn't:
Note that I had typed just
win and there was no windows-8 tag.
But when I type
wind I see it: