A download manager is a program that makes downloading files faster, easier, and more reliable. Most people don't need a download manager, but under the right circumstances such software can be very useful. You may want a particular file that's updated daily in the wee hours of the morning.
Can I download without IDM?
If you want to temporary disable IDM for single download you may hold Alt button while clicking on the download link to prevent IDM from taking the download. ... Then press "Add" (arrow 1 on the image), enter a site that you do not want to download with IDM from and press "OK" (arrow 2 on the image).
Why is IDM needed?
It is only available for the Microsoft Windows operating system. Internet Download Manager (IDM) is a tool that manages and schedule downloads. It can use full bandwidth. It has recovery and resume capabilities to restore the interrupted downloads due to lost connection, network issues, and power outages.