What is it?
Norton AV Auto Protect Service - navapsvc.exe
What does navapsvc.exe do?
This is the service that is run by Norton AV to protect your system from infection. This does things like scan your emails as they come in and scanning files as you open or download them. This can be a severe resource hog if all of the options are enabled. I personally turn a lot of these options off and use my head for bug avoidance.
You'll want to keep an eye on this google search for any known viruses. The normal location of navapsvc.exe is C:Program FilesNorton AntiVirusnavapsvc.exe
Nearly every virus out
there tries to knock this file out!