Recently, specialized programs such as Yandex-Defender have become increasingly popular. Their main purpose is to block spontaneous changes to browser settings. When you try to make changes to the parameters of the Internet viewer, the user receives a message according to which he can either accept them or reject them.
This need arose in connection with the widespread spread of viruses. For example, there is a Webalta search engine that infects a PC with a special malware program. The algorithm of her work is as follows. When you get to this page, a special program is integrated into the browser. She unbeknownst to the user sets the default search engine to the default if there is no Yandex-Defender on the PC. The next time you start, the start page will be different, and many of the features that are in a regular system will be blocked. And advertising on this service is suitable only for adults. In general, it turns out some trouble.

Yandex-Defender is designed specifically to combat such unauthorized access. It cannot be installed separately. It comes exclusively with a software package such as Yandex-Bar. You can download and install this software package on the official page of this search service. In some cases, it can be embedded in some applications developed by the company (for example, a toy made by Yandex and supplemented by Yandex-Bar). As a result, the program is installed in the same directory as all other components, such as the Launcher or the Browser Panel. Defender configuration is not provided.
The principle of operation is as follows. When the operating system starts in the background, a separate application is launched that monitors browser settings and monitors their changes. When you try to make changes to the settings of the viewer, Yandex-Defender is triggered. The virus is blocked until the user gives permission to unlock by clicking the corresponding button in the window that appears. Moreover, the program is tied not only to one search engine, but can also work perfectly with others, for example, Yahoo or Google.
If in the process it becomes clear
that such an application is not needed, it must be uninstalled. Again, Yandex Defender cannot be removed separately. Therefore, you will have to delete the entire Yandex-Bar package. To do this, go to the
Control Panel, find the shortcut "Programs and Features" and double-click the left mouse button to open it. In the list that opens, you need to find Yandex.Bar, select it, and click the Uninstall button. And perform this procedure, following the instructions of the system. At the final stage, it is recommended to completely delete the directory at drive C, the Program Files directory, the Yandexbar subdirectory.
The attitude of most users to such a program is ambiguous. On the one hand, an additional process is running in the background, which increases the load on the PC. But on the other hand, the same stream provides additional computer security. What is more important - the user must decide, and based on the decision made, whether or not to install Yandex-Defender.