spn.exe is part of a product called known as Stellar Phoenix NTFS Data Recovery and the developer is Stellar Information System Ltd. .
If you think that this file contains a virus or another malware, please download a virus scanner.
If spn.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 Stellar Phoenix NTFS Data Recovery from the list to remove the process spn.exe from your computer.
If you have any problems with spn.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 Stellar Information System Ltd., the developer of spn.exe and ask for more information.