Everyone knows that Vista SP1 is due out soon, but if you're having any trouble now (I'm not anymore), you might take a look at these two updates:
You don't need to install these now unless you're having some trouble. These should be rolled up into the SP1 when it comes out, so you'll get them automatically later anyway.
If you do download, make sure you get the appropriate 32-bit or 64-bit version.
It doesn't say in the release notes, but I personally recommend that you install 1, reboot, install 2, reboot to avoid problems. Just a good practice, IMHO.
Scott Hanselman is a former professor, former Chief Architect in finance, now speaker, consultant, father, diabetic, and Microsoft employee. I am a failed stand-up comic, a cornrower, and a book author.
Disclaimer: The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.