The n5actions.npp file is part of NPActions from Nitro PDF. Nitro PDF allows users to created and edit PDF files. The n5actions.npp error happens when Nitro PDF tries to open up n5actions.npp and cannot. Since the n5actions.npp file is located in the Windows registry, the error is a typical registry error.
You may be tempted to download a new n5actions.npp file. This may or may not work. Anytime you change something in your computer’s registry, you have to change the other files associated with it. If you don’t know what you are doing, this may actually cause more problems than it resolves.
It is much safer to allow a registry cleaner to do the work for you. ZookaWare PC Cleaner provides a free scan. It allows you to check to see if you even need a registry cleaner. If it detects errors, then you will want to purchase a license. The license is good for one year and comes with a 60-day money-back guarantee.