nav.exe is a application which is most likely NOT a virus. So, if nav.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your PC is virus-free, it is still recommended to run a well-known antivirus with a good track record, in order to yourself your PC against viruses and malware.
This application is normally found in C:\Program Files (x86)\Norton AntiVirus\Engine\188.8.131.52\nav.exe.
The MD5 checksum for this file is 4bda87d35257827ac6d7e7e83a7bbc0e.
This application is set up as a Windows service. This means it runs on your system in background, usually without showing any user interface to you. Most Windows services are useful programs, which provide useful functions to other programs or to the Windows Operating System.
This program uses the Internet to communicate. In this day and age this is quite normal. For example, most of the apps on your computer check for updates. For this, Internet communications are required.
This exe runs as a 32-bit program. It can not benefit of the entire power of modern computer chips. This ordinarily happens because the publishers did not bother to upgrade it to 64-bit code.
The description present in the program is Norton AntiVirus.
File version extracted from the file 184.108.40.206.
Maker Symantec Corporation.
Legal copyright Copyright (c) 2015 Symantec Corporation. All rights reserved..
nav.exe appears to have visible windows. This means it doesn't operate in some kind of stealth mode. Its operation is clearly shown to the user.
nav.exe is digitally signed. Today most clean programs are digitally signed.
The digital signature extracted from nav.exe verifies as ok. This is very good.
Digitally signed by: Symantec Corporation
Certificate's issuer name: VeriSign Class 3 Code Signing 2010 CA
It has an uninstall string in registry, which is good. si are uninstall.