NTDownloader.exe is part of a product called known as ESA Polymath 2.2 and the developer is ESA Elettronica S.p.A .
If you think that this file contains a virus or another malware, please download a virus scanner.
If NTDownloader.exe is using too much CPU or too much memory in your system, it is possible that your file has been infected with a virus. Installing an antivirus is recommended.
Not all processes can be uninstalled without the help of a 3rd party tool, especially malware. To see if it can be uninstalled, first go to Start > Control Panel > Add/Remove programs and select ESA Polymath 2.2 from the list to remove the process NTDownloader.exe from your computer.
If you have any problems with NTDownloader.exe, you may try using a registry cleaner or a speed-up software to check, analyze, and fix problems that are affecting the performance of your computer.
You may try contacting ESA Elettronica S.p.A, the developer of NTDownloader.exe and ask for more information.