Opcnetapidll (EASY)

If automatic registration fails, use RegSvr32:

Before attempting any fix, restart your computer. Many transient file locking issues resolve after a reboot. opcnetapidll

If legitimate, you may find opcnetapidll in: If automatic registration fails

| Location | Likelihood | Notes | |----------|------------|-------| | C:\Program Files (x86)\Common Files\OPC Foundation\ | High | Part of OPC Foundation .NET API runtime | | C:\Windows\System32\ | Low | Unusual – often indicates misconfiguration or malware | | Application’s install folder (e.g., C:\Program Files\MyOPCClient\) | High | Private assembly deployed with the app | | C:\Windows\SysWOW64\ | Low | 32-bit version on 64-bit Windows | use RegSvr32: Before attempting any fix