I did the whole Virtuous Blood quest in an earlier game without problem. This time through, I meet Seridur in his house, follow him to the basement. He stops near bookcase, next to the Dunmer Brother - and that's where the problem starts.He won't talk to me, just keeps saying "Shh, can't talk here". I've tried pushing both NPCs around to separate them but that didn't help. So I eventually resorted to using the player.setstage console command to move past the conversations with him and get all the appropriate journal entries. However, none of the people in the Order at that point have any dialogue options relating to vampires.
I travel to Roland Jenseric's cabin and again have to use player.setstage to skip through the scene because he has none of the dialogue options either.
I go to Memorial Cave and kill the vampires. Seridur - at last! - actually does his spiel without prompting via the console. But now, he won't stay dead, just goes unconscious. So I use the console command to fix that too.
Return to Roland and use console to tell him the good news and get the journal entry to return to Seridur's house. Travel to the house and get rewarded and accepted into the Order.
And now, there's no dialogue options for "vampires" which means I can't sell him the vampire dust.
I'm not hugely bothered by this since I have plenty of money anyway, but I would like to know what went wrong with the quest, particularly given it was fine in a previous life.Jewel