How To Start Winpcap Driver Manually I currently manually start the WinPcap driver (aka NPF), use Wireshark, and then manually stop the driver. Is there a way to have this driver start automatically. It is because during the installation WinPcap driver software is reloaded. Otherwise the driver for Manually starting GNS3 as Administrator. NPF creates a device for every valid network adapter. The new device points to the NPF driver, but contains information about the original device. In this way, when the user opens the new device, NPF will be able to determine the correct adapter to use.
![Start Npf Driver Manually Start Npf Driver Manually](/uploads/1/2/5/8/125847931/923645971.jpg)
To cllear this error, you need to open the file called npf.sys which is located at
in Windows 7. Follow the below guide to open the npf.sys file.
Firstly, make sure that you have installed winpcap, if you didn't install it, just go to its official site and download it for installation: http://www.winpcap.orgNext, find cmd.exe which is located at
in Windows 7, right click and 'Run as administrator'. When it opened, input net start npf, then the NPF driver is successfully opened. That is,the file npf.sys is opened.
At last, restart Wireshark, it will be OK now.
BTW, if you have other driver problems or want to update, backup or restore drivers, the free program DriveTheLife (official site: http://www.drivethelife.com) is a perfect one.
Note: If you are using Linux or Ubuntu, after WinpCap is installed, use the common ' >$ su Administrator ' to switch to the highest authority account, then input net start npf .
If you are using Windows XP, login with administrator account then open cmd, input net start npf.