Step 1: Uninstall IDM if you have already installed and restart your PC.
Step 2 : Download and install the latest version of IDM from its official website.
Step 3: It shows an error message that you have registered IDM using fake serial key and IDM will exit if you already used IDM trial period.
Step 4: Exit IDM from system tray.
Step 5 : Download this virus free crack file.
Step 6: Copy/paste crack file to installation directory C:\Program Files\Internet Download Manager (overwrite original)
Step 7: Run IDM