ndisapi.dll is a dynamically linked library file that might contain a malicious code. According to PC security experts, this file is usually installed and used by Alpha Antivirus. In this case, ndisapi.dll is used for implementing the most of parasite's functions. While its work is closely related to executables or other pest files, sometimes this library file can work as an independent component, such as harmful web browser plugin or hidden system service.
If you have just detected ndisapi.dll, ndisapi.dll.vir or similar file on your computer, you should delete it immediately after detection because wasting the time might result in PC-related problems. Virus, which is related to ndisapi.dll.vir, might continue to violate your privacy and might pose a serious harm to your computer. In order to avoid difficulties that might appear while erasing this file from the system, you should consider using a reputable anti-spyware program. For that we highly recommend using Reimage Reimage Cleaner Intego, which will help you to get rid of all related viruses.
Attention! Sometimes a presence of ndisapi.dll does not indicate that your computer is infected. It can be an essential system file or a file installed by harmless legitimate software and therefore may not pose any threat to your privacy and the system. Although such cases are quite rare, you should thoroughly examine ndisapi.dll before deleting it from the system. For that you can use RegCure Pro.