Internet download manager is one of the most popular and the best download manager tool. Most of we prefer IDM for our downloading purpose because of it’s awesome features. But this useful application is not free, we have to pay and buy this application. It comes with 1 month trial period and after the validity ends you have to buy this application. Most of we use patches and cracked version of IDM, but we don’t think that most of the patches or cracked software may contain virus. So here I will describe you how to crack IDM manually so that you will be safe from possible virus attack and also you will get lifetime validity on your IDM. When we update IDM it shows that IDM is registered with fake serial number but IDM exists, then it will stop downloading. By using this trick your IDM is registered for life time and you will not get any error while updating next time.