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File version : v2.1.10.0 built by: WinDDK
Description : Sierra Wireless USB MUX Driver
Copyright : Copyright Sierra Wireless Inc. 2007
Product Version : 1.0
Product Name : Sierra Wireless USB Modem
Company Name : Sierra Wireless Inc.
Internal name : SWUSBMUX.SYS
File Size: 197640 byte(s) 193.8 KB
MD5 : 46394d236ec92f79f5cc6c4319143b25
SHA1: 4A95192017CA361D6C54FCDE3300FC62A4971C7F

Download swmx00x64.sys
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How to Install swmx00x64.sys
Repair Sys ProblemsFixing a corrupted or missing swmx00x64.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.