Either uninstall Avast or save the text below into a avast-npcap-conflict-fix.reg and then double-click to solve this problem, it depends on you.

The temporary workaround is copied here from Avast forum. After reboot, loading of NPCAP driver will be postponed to the time when our firewall is running and boot-time WFP rules are out of game. Please, rename attached file to npcap.reg and import it to the Registry by double-click. Good news is that some workaround exists. There is only one possible cause of this problem - our firewall is using so called boot-time WFP rules, but all of them are set as pass-thru if our driver is not running. This is pretty weird because our driver is not loaded in the time when NPCAP initialization (DriverEntry) is failing in the function WSKBind (STATUS_ACCESS_DENIED) and in addition, Bind function is not filtered by our firewall. Using win10pcap (not using nopcap or winpcap) re-installing wiresharkĪfter remove winpcap and installing winpcap again, 'sc query npf' > The specified service does not exist as an installed service.This problem is caused by very mysterious conflict between our firewall driver and the NPCAP. Trying install npcap after installing wireshark Wireshark is Open Source Software released under the GNU General Public License.Ĭheck the man page and for more information. Built using Microsoft Visual Studio 2017 (VC++ 14.16, build 27034). Running on 64-bit Windows 10 (1903), build 18362, with AMD Ryzen 3 2200U with Radeon Vega Mobile Gfx (with SSE4.2), with 7068 MB of physical memory, with locale English_United States.1252, with Npcap version 0.9983, based on libpcap version 1.9.1-PRE-GIT, with GnuTLS 3.6.3, with Gcrypt 1.8.3, without AirPcap, binary plugins supported (14 loaded). Fortunately, the Nmap Project stepped up and converted the original WinPcap to the new NDIS 6 API, giving users a fast. But when Windows 10 was released without NDIS 5 support, WinPcap failed to keep up, leaving users wondering what to do. There is NO warranty not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.Ĭompiled (64-bit) with Qt 5.12.5, with WinPcap SDK (WpdPack) 4.1.2, with GLib 2.52.2, with zlib 1.2.11, with SMI 0.4.8, with c-ares 1.14.0, with Lua 5.2.4, with GnuTLS 3.6.3 and PKCS #11 support, with Gcrypt 1.8.3, with MIT Kerberos, with MaxMind DB resolver, with nghttp2 1.39.2, with LZ4, with Snappy, with libxml2 2.9.9, with QtMultimedia, with AirPcap, with SBC, with SpanDSP, with bcg729. For 14 years, WinPcap was the standard libpcap package for Windows. License GPLv2+: GNU GPL version 2 or later This is free software see the source for copying conditions. Copyright 1998-2019 Gerald Combs and contributors.

Npf service windows 10