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File Version : built by: WinDDK
Description : Broadcom NetXtreme Gigabit Ethernet NDIS5.1 Driver.
Copyright : Copyright 2000-2004, Broadcom Corporation.
Product Version :
Product Name : Broadcom NetXtreme Gigabit Ethernet Driver
Company Name : Broadcom Corporation
Internal Name : b57amd64.sys
File Size: 191488 byte(s) 187.0 KB
MD5 : 41d75e92d4da6bd07e65b33ae97ba2b9
SHA1: 2907F121E9EF3D1755BA681D03AA187FF4BB31D2

Download avgmfx64.sys
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How to Install avgmfx64.sys
Repair Sys ProblemsFixing a corrupted or missing avgmfx64.sys error is an easy process with a few steps. Open the zip-file you downloaded.Extract the .sys file to a location on your computer. We recommend you to unzip the file to the directory of the program that is requesting the file.
If that doesn't work, you will have to extract the file to your system directory.
By default, this is C:/WINNT/system32/drivers (Windows NT/2000).
or C:/Windows/system32/drivers (Windows XP, Vista, 7).
Make sure overwrite any existing files (but make a backup copy of the original file)
That should be it. Although not necessary you can reboot your computer as well.