f1860_nswigho.dll is a DLL file of unknown origin. Files of unknown origin are more likely to be harmful than helpful to your computer. There is more malicious software being produced now, than ever.
Malicious software could be just a nuisance, like spyware or adware, or it could be something more serious like a keystroke logger or a Trojan horse. Since nothing is known about f1860_nswigho.dll, there is no way to know for sure.
No matter what it is, if it is giving you an error on your computer, it is time to get rid of it. It is obviously not helpful to your system. Let ZookaWare PC Cleaner check your system’s registry for free. They show you all the errors on your computer and eliminate them along with a sound guarantee.