XTR Toolbox is a portable open-source app to optimize, clean, tweak and protect your privacy in Windows.XTR Toolbox is relatively easy to use with four categories - Quick Tools, Privacy Tools, Other Tools, and Cleanup Tools. It starts with a "dark theme" using brown and white but you can uncheck that at any time to go brighter.Quick Tools allows you to rebuild your icon and font cache. Privacy Tools feature a Windows apps manager and the ability to remove telemetry. Other Tools has a startup, services, software, and hosts file managers. Finally, cleanup has a junk files cleaner and chrome extensions manager.While overall, the app is excellent, there are a few oddities. Uninstalling telemetry says that it will remove telemetry from Windows 7 and 8 with no mention of 10, causing us to hesitate. Windows App Manager does not detect what is or isn't installed and offers to reinstall all apps, something we know can be hit or miss as some Windows apps, once removed, can't be restored. Junk files cleaner appears to be decent, but there's no browser specific cleanup listed, and you have to select each category one by one. It was incredibly fast, however. Software manager can remove software, but with so many uninstallers available, we hate to see anyone offer the old Windows uninstall method.Overall, XTR Toolbox is an excellent fit, assuming it has the tools that you need. While not a complete suite of everything but the kitchen sink, it has many tools that most people will find useful.