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File version : 6.1.7600.16385 built by: WinDDK
Description : Explore Systems Virtual Audio Device
Copyright : Copyright (C) Explore Systems Inc.2012
Product Version : 6.1.7600.16385
Product Name : Windows (R) Win 7 DDK driver
Company Name : Windows (R) Win 7 DDK provider
Internal name : dfx.sys
File Size: 28008 byte(s) 27.360 KB
MD5 : 51d50a9a72c18e4629891bf381d123ba
SHA1: 72AC9FE2676B4F4CB44A3E2A9AC662D51409C4D1

Download dfx11_1x64.sys
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How to Install dfx11_1x64.sys
Repair Sys ProblemsFixing a corrupted or missing dfx11_1x64.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.