Right-click the Gridinsoft Anti-Malware 4.2.55.rar file and select "Extract Here" (using 7-Zip or WinRAR). Install: Run the extracted .exe installation file.

It is strongly recommended to download security software only from official or trusted sources to avoid malware infections.

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While you are asking for version 4.2.55, security software is frequently updated. It is generally better to download the latest version offered by Gridinsoft to ensure you have the newest threat definitions. General Installation and Usage Steps