HickoryHacksXP
- Various XP tips to help performance, including useful "how-to" information.
- http://www.hickoryhacksxp.com/

TotalXP.com
- Detailed guides and tips to tweak Windows XP for best performance and usability. Suitable for beginners, too.
- http://www.totalxp.com

Optimizing a Windows PC
- Information about installing, optimizing and imaging Windows.
- http://www.optimizingpc.com

Windows XP Helper with NewsLetters, Tips, Tricks Tweaks for Windows XP
- A guide to help tweak and fix Windows XP. A bi-monthly newsletter with tips and tricks explained.
- http://www.pc-ask.com

Windows XP Maximized Website - Tips, Fixes, and Tweaks for Windows
- Information and technical resources to help you get the most from Windows XP.
- http://www.xpmaximized.com

OptimizeXP eBook
- eBook that shows step-by-step procedures to speed up and optimize Windows XP.
- http://www.optimizexp.net/

Windows XP Services Tweak Guide
- A step by step guide to tweaking Windows XP Services.
- http://members.internettrash.com/megapolon/winxptweak.html

Tweak.us
- Tweaks for Windows XP with step-by-step explanations. Also suitable for beginners.
- http://www.tweak.us

TLab404
- Customisation and performance tweaks for Windows 2000, XP and Server 2003.
- http://www.tlab404.com/

Running IIS on XP Home Edition
- A step by step tutorial about how to run IIS on Windows XP Home Edition.
- http://www.xfriday.com/xp_home_iis_problem.asp

XP Smoker
- A tweaking utility for reducing system bottlenecks, increasing speed and deleting unnecessary services. Trial version available for download.
- http://www.xp-smoker.com

Optimize XP
- A guide to improve system performance with the Windows XP operating system.
- http://mywebpages.comcast.net/SupportCD/OptimizeXP.html

Tweak Internals
- Provides software for tweaking and optimizing Windows XP.
- http://www.tweakinternals.com

MusicXP.net
- Advice and guidance on optimizing Windows XP for professional audio and music applications.
- http://www.musicxp.net/

XP Product Key Modifier
- Application written to automate the task of changing the product key in Windows XP.
- http://ryan.ript.net/xppid/

Tweaking Toolbox XP
- A program designed to improve security, appearance and performance of Windows XP [Internet Explorer required].
- http://www.tweakingtoolbox.com/tt-xp/

WinXpFix.com
- Tips and tweaks, partially organized by topics. Includes news and articles.
- http://www.winxpfix.com/

MagicTweak
- Program designed to optimize and personalize Microsoft Windows.
- http://www.magictweak.com/

TweakXP.com
- Dedicated to improving and customizing XP. Tweaks are for the user interface, system performance, and the internet.
- http://www.tweakxp.com/tweakxp/

Windows XP Tweak Guide
- Provides an extensive range of registry tweaks, tricks and hacks for optimizing and tweaking the Windows XP operating system.
- http://www.winguides.com/windowsxp/