How to Remove ESET Antivirus When Forgot It's Password

Sometimes ago I managed to install a demo version of nod32 server management console and a few clients then during the initial configuration I add a simple password to make it more secure and as you may guess by the title the password did not work later so the anti virus wouldn't uninstall!.
after a few Research on PC, I came up to this solution :

What is Plug and Play (PnP)

Plug and Play (PnP) is a capability developed by Microsoft for its Windows 95 and later operatingsystems that gives users the ability to plug a device into a computer and have the computer recognize that the device is there. The user doesn't have to tell the computer. In many earlier computer systems, the user was required to explicitly tell the operating system when a new device had been added. Microsoft made Plug and Play a selling point for its Windows operating systems. A similar capability had long been built into Macintosh computers.

What Is Plug-In

Plug-in applications are programs that can easily be installed and used as part of your Web browser. Initially, the Netscape browser allowed you to download, install, and define supplementary programs that played sound or motion video or performed other functions. These were called helper applications. However, these applications run as a separate application and require that a second window be opened. A plug-in application is recognized automatically by the browser and its function is integrated into the main HTML file that is being presented.

3-D (Three Dimensions or Three-Dimensional)

In computers, 3-D (three dimensions or three-dimensional) describes an image that provides the perception of depth. When 3-D images are made interactive so that users feel involved with the scene, the experience is called virtual reality . You usually need a special plug-in viewer for your Web browser to view and interact with 3-D images. Virtual reality experiences may also require additional equipment.

What is RSS

RSS is an XML-based vocabulary for distributing Web content in opt-in feeds. Feeds allow the user to have new content delivered to a computer or mobile device as soon as it is published. An RSS aggregator or RSS reader allows the user to see summaries of all their feeds in one place. Instead of visiting multiple Web pages to check for new content, the user can look at the summaries and choose which sites to visit for the full versions.