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1. Do go outside in the daylight, drink blood from a sleeping NPC.
2. To get cured, it involves fidning a mage or something. I forgot the rest.

The Count of Skingrad accepted his vampirism, but his wife did not, and refuses to feed. Speak to him.

Now, since he's a Vampire, I don't know how to do that. One would assume that he'd be reclusive enough to stay away from the citizens' eyes. His assisstant(if you're in the Mages' Guild, Arcane University, his first assisstant is likely dead at the Count's(or your) hands).

That's all I can tell you. As Meow Meow said, the Mages Guild would be a good place to start. They are one of his few allies, as they use his Vampirism to their advantage, and know about it.

Lastly, you'd better hope that you're good at speechcraft. My brother(who cured it) said that it helped.