TweakVI is a Windows Vista tweaking tool that comprises hundreds of features that let you customize not only the way the operating system looks, but also boost performance and increase Internet speed.

With a well-organized interface that displays all major features in a separate panel in the left side of the main window, TweakVI is aimed at both rookies and experienced users, offering advanced instructions and a comprehensive help file to assist them all the time.

Basically, the application is focused on five different chapters, as it follows: “System Information and Tweaks”, “Miscellaneous Tweaks”, “Visual Tweaks”, “Internet Tweaks” and “Utilities”.

Of course, the first of these goodies shows system information, but also lets you optimize the hard disks and autorun settings, CD  and CPU, lending you a hand to squeeze even the last drop of performance out of your system.

The “Miscellaneous Tweaks” screen gives you the power to change system folder settings, set up the mouse, play a little bit with the media player and configure Windows Vista feature restrictions.

While the “Visual Tweaks” enables all users to customize the Start Menu, fonts, desktop, wallpapers and other visual elements, the “Internet Tweaks” menu is aimed at both Internet Explorer and Firefox, with multiple optimization tools for a more stable and faster experience.

Of course, with so many tools included in a single application, it takes days to discover them all, so you may need a lot of time before being able to take full advantage of TweakVI's great features. Plus, it's recommended to make a backup before jumping into any modifications, just to make sure you're on the safe side.

As said, TweakVI works exclusively with Windows Vista, with both 32- and 64-bit versions supported.

All things considered, TweakVI is one of the best tweaking tools for Windows Vista and thanks to its impressive number of features, it's definitely one of the top products in this particular category.