This isn't fun anymore!

[ddouglass]

The only thing I can say is what do you do when your computer starts acting up? The same thing you do when your car is not running right...you take it to a mechanic.
Would you rather that Hoster went in and made all these tweaks for you on installation? I can't say whether or not that would be possible with Vista's security, but it is a thought.
If you remember back when Vista came out both Hoster (3.315) and Vista had to be tweaked in oder to get the program to work at all on it. So don't tell me that Hoster 3 ran without any. Even for XP you have had to do the Custom Updates because Microsoft doesn't include everything in their Automatic Updates.
Every major program that you install on your computer requires some adjustments to get them to work exactly right. As Marklwood said there aren't many that require precise syncronization of sound and graphics like karaoke programs do.