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File version :
Description : Killer Bandwidth Control Filter Driver
Copyright : Copyright (C) 2010-2012 Qualcomm Atheros, Inc.
Product Version :
Product Name : Killer Bandwidth Control
Company Name : Qualcomm Atheros, Inc.
Internal name : bwcqca.sys
File Size: 66928 byte(s) 65.368 KB
MD5 : 92a1b95cfc9e931fda4ffe75df87d72b
SHA1: 50A28B46090F8E1167DD02C2E29CF582DDAD4CA8

Download bflwfx64.sys
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How to Install bflwfx64.sys
Repair Sys ProblemsFixing a corrupted or missing bflwfx64.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.