I've collected these over the years, and I keep them in My Documents so I can setup a new machine the way I like it. I remember where I found a few, others not so much. So, if I've not thanked you - thank you. If you were the one that made a particular hack, let me know in comments and you'll be attributed.
Warning: Use this stuff so VERY much At Your Own Risk. And read them in notepad before you double-click to make sure any paths are appropriate to your machine.
UPDATE: Sorry, my ISP was blocking .reg extensions. They are now .txt, you'll need to SaveAs... them yourself.
UPDATE^2: Oy, sorry again, bad link on VolumeCaches.reg and bad chars in MajorControl.reg. Fixed. Thanks for catching it.
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.