RPGM MV Engine is heavy RAM eater, try to kill any unneccesary process from the background... mainly web browsers.
You might have an issue with your harddisk share, did you try putting the game in a different partition?
I figured out why it was acting so poorly. It was because of the antivirus. I made exceptions for the game and now it works like a charm. It is odd that it made it act this way, while the antivirus gave no notification or warning or anything...
Which leads me to a problem now that the game works. I am stuck at the cemetery with the vampire sisters. I fed all of them, a different meal, human/gnome/bat breeder, each to a different sister, and i pleasured a different sister each time, yet it doesn't trigger the bet scene... I don't know what to do
Also, in the Let there be light quest, i found the journal in the room. But when i go down one more level, the only door open is the one with the fountain. I can't get in the room with the shelves. It says it is locked. EDIT: Nevermind, i`m stupid. It wasn't the room to the right. It was the room next to the statue.