• Immediately disconnect from the internet.
• Run a full antivirus/anti-malware scan (Windows Defender, Malwarebytes, Kaspersky, etc.).
• Change all important passwords from a clean device.
• Monitor bank/credit card statements for unauthorized charges.
• Consider reinstalling your operating system if the infection seems severe.

Because this filename is characteristic of files shared on peer-to-peer or unauthorized streaming sites, "installing" it typically refers to how to play the file or manage the download rather than a traditional software installation.  How to Use This File Type  System Requirements:

Before clicking any link or running any “installer,” it’s critical to understand what such files often contain, the legal alternatives available, and how to protect yourself online. Immediately disconnect from the internet

Installation Guide

The filename contains specific technical metadata used by digital release groups: Jagame Thandhiram (2021):

• Authentic WEB-DL files are never distributed via random websites with “install” prompts.
• Real files are MKV or MP4, not .exe, .scr, .msi, or .bat.
• If a website asks you to download a “special player” or “codec pack” to watch a movie — that’s a classic malware trick.