Idmgcext.crx ((free)) -

Have you seen this file without having IDM installed? Run a full antivirus scan just to be safe.

C:\Program Files\Internet Download Manager\ Manual Installation Guide idmgcext.crx

The idmgcext.crx file is the "handshake" between your computer and the web. By knowing where it lives and how to manually install it, you can ensure your downloads stay fast and organized without relying on buggy browser defaults. Have you seen this file without having IDM installed