Try to right-click NAF380.exe in Task Manager then select "Properties" to determine the location of the file. If you have the location already. Navigate to the said location and then send the file for single malware scan: http://www.virustotal.com/
See if any malware scanner will flag it.
You can also right-click the NAF380.exe (when you have the path/location already) to check if it's related to any installed program.
When I was checking TaskManager, I saw this file running. I tried to search my PC but, it failed twice seaching and did not let me search. Then I searched online but could not find anything. Do you have ant idea what NAF380.exe might be?