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File Version : built by: WinDDK
Description : Atheros Extensible Wireless LAN device driver
Copyright : Copyright (C) 2001-2006 Atheros Communications, Inc.
Product Version :
Product Name : Driver for Atheros Wireless USB Network Adapter
Company Name : Atheros Communications, Inc.
Internal Name : athrusb.sys
File Size: 891392 byte(s) 870.512 KB
MD5 : 465293fd9f2e31a18c5b64a7a578d601
SHA1: 9B010453273AAE8510DC9E5B822D0882CBD87647

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