Ultimate Windows Tweaker is a freeware TweakUI Utility for tweaking and optimizing Windows 7 & Windows Vista, 32-bit & 64-bit. It can simply be downloaded and used as a portable application to customize your Windows to meet your requirements. With judicious tweaking, it can make your system faster, more stable, and more secure with just a few mouse clicks. The tweaker detects whether you have Windows 7 or Windows Vista installed and accordingly offers you the relevant tweaks only.
It has a lot of features.This program has an ability to detect whether you have installed IE7 or IE8 and give the relevant tweaks according to the version installed on you system. Different tweaks have been organized into various sections, they are :
2) User Accounts & UAC,
3) System & Performance,
5) Internet Explorer (IE7 / IE8)
6) Network Optimization
7) Additional Options
UPDATE: 25th Jan 2011. Ultimate Windows Tweaker has been updated to v 2.2. It now works on Internet Explorer 9 and includes additional tweaks too