C++navigator.dll comes from the High-performance Embedded Workshop program from Renesas Technology Europe Ltd. The security threat is unknown, although it is thought just a registry error.
The only way to tell if a DLL is legit or a virus is to check the directory the error is reported to come from. In order to do this, you need to run a registry scan. ZookaWare PC Cleaner is a registry scanner. It will run a free registry scan and if it finds anything, you can purchase the product for $29.95.
It guarantees 100% removal. If it doesn’t remove it immediately, then they will work on a solution to remove it within 24 hours. This is backed up by a 60-day money-back guarantee.