I have tried every online solution , run as admin, re-install the npf.sys appears in windows/system32/driver and msinfo>software environment>system drivers>npf but the driver can't be start there is no NetGroup Packet Filter Driver in my Device manager>Non-Plug and Play driver
really need help with this !!
asked 07 Dec '15, 22:18
SYstem error 31 means:
A device attached to the system is not functioning.
It's very obscure to understand what it actually means.
You can try Npcap: https://github.com/nmap/npcap/releases, it is a fork based on WinPcap and have built its own drivers. So it will possibly solve your issue.
answered 11 Apr '16, 17:36