Windows Vista/7: If you liked the ease of use and wizard-driven tweaking found in Vista Services Optimizer and miss it now that you've upgraded to Windows 7, you'll definitely want to check out the new Windows 7-friendly version.
We first shared Vista Service Optimizer with you earlier this year, when it was Vista-only. Since then it has been updated to support Windows 7.
It still has great time-saving features like automating customisation, the ability to create profiles for various tweaks—some tweaks you'd only want applied when you're trying to max out system resources for gaming, for example—and a rescue centre which will undo changes made my Vista Optimizer and other applications that tweak your Windows services.
Vista Services Optimizer is free, open source, portable, and available for both Windows Vista and Windows 7.