Software & Apps Windows How Do I Find My Internet Download Manager Serial Number? What to do when you've lost your IDM Serial By Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated April 06, 2020 Windows The Ultimate Laptop Buying Guide Tweet Share Email Internet Download Manager is one of the most popular download managers in the world and, like most commercial programs, requires a unique serial number before it can be used. IDM offers a 30-day trial period but this demo window is not extendable. So if you've been using Internet Download Manager for a while and see prompts for a serial number, this is why. The Internet Download Manager serial number is technically a product key and not a serial number but many developers use the two terms synonymously. How to Find Your Internet Download Manager Serial Number Use IDM's automatic online serial number retrieval tool or by using a product-key-finder program. The serial number retrieval tool on IDM's website is probably your best bet, so long as you were the person who purchased the program. A key-finder tool is a way to go in pretty much every other situation with a lost IDM serial number. Use IDM's Serial Number Retrieval Tool The official way to obtain your legitimate, paid-for Internet Download Manager serial number is to use their online tool to have it sent to you. The process is easy: Visit the Internet Download Manager Serial Number Tool page. Enter the email address you used when you purchased IDM. Enter the code as shown. Press the Submit Query button. A few minutes later, you'll receive an email from Tonec Inc., the company that created and sells IDM. In it, you'll find your IDM serial number, which you can use to reinstall the program. However, if you no longer have access to the email address that you used to purchase Internet Download Manager, there's no way to get your IDM serial number this way. You'll need to try a product-key finder or buy a new copy of IDM. Find Your IDM Serial With a Product-Key-Finder Program A product-key-finder program will find the product keys and serial numbers for the software installed on your computer. Most programs that require serial numbers store them in the Windows Registry after they're entered, usually during or soon after you install the program. This is also the case with Internet Download Manager. So long as IDM is still installed, or in some cases even if it's not installed but it hasn't been too long since it was previously installed, a product key finder tool should be able to automatically locate, decrypt, and show you your legitimate IDM serial number. Here's how to do it: Download LicenseCrawler, one of many free product key finder programs but one that we've confirmed will locate an IDM serial number, assuming it's still in the registry. Open LicenseCrawler and press Search. Wait while it scans the Windows Registry and locates the product keys (serial numbers) for your installed software. Once complete, scroll down until you find Internet Download Manager or IDM in the list. Write or securely store the IDM serial number, which appears as four sets of five characters, like xxxxx-xxxxx-xxxxx-xxxxx. Now that you have your IDM serial number, you can use it to reinstall the program. If LicenseCrawler doesn't work, or you don't want to use it for some reason, you're welcome to try any of the many free product key finder programs out there. Other IDM Serial Options The only other legal and ethical way to get a fully working version of Internet Download Manager is to buy a copy of the program. Key generators or online lists of serial numbers are not legal ways of obtaining the program. Not only that, there are other concerns with keygens as well. If you purchased a copy of IDM, do your due diligence and contact Tonec, try some key finder tools, dig through your old emails—whatever you need to do.