System Readiness tool?

Will installing the System rediness tool listed below remove any .dll customizations I have?

Microsoft Releases System Update Readiness Tool for Windows Vista, Windows 7 and Server 2008 - Tweaking with Vishal

What is the System Update Readiness Tool?

System resources, such as file data, registry data, and even in-memory data, can develop inconsistencies during the lifetime of the operating system. These inconsistencies might be caused by various hardware failures or might be caused by software issues. In some cases, these inconsistencies can affect the Windows servicing store, and they can cause software updates not to work. The System Update Readiness Tool tries to resolve these inconsistencies.
You do not have to manually run this tool. This tool is offered automatically through Windows Update to computers that have a condition that the tool could resolve.

Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2 Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2

The following table lists error messages that you might receive when you try to install a software update. These errors might be caused by a system irregularity that the System Update Readiness Tool might be able to resolve. However, the tool might be unable to fix all instances in which these errors occur.