"ATop Software is almost 100% genuine. But that "almost" can cost you hundreds of dollars! It works like this. You can purchase Microsoft and Adobe product keys from ATopsoftware, download the software or operating system and it will work perfectly. However, Adobe won't recognize you as the owner of the software because you cannot register it in your name. As a result, you won't be able to deactivate the software on an old computer if you want to install it on a new computer. And if you have more than two computer crashes it will appear that you have exceeded your license and you won't be able to use it. And you won't be able to get Adobe to recognise your proof of receipt for two reasons (1) ATop says it is "OEM" software, but adobe will not recognize your purchase receipt because it doesn't recognise OEM software that is purchased separately to the computer and (2) Adobe will not recognise your purchase if it has been discounted more than 25% off the retail. If you ask ATop Software about any of these issues, they will ignore you. So, the software works, but you are paying a price for their super low deals."