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File Version : v2.0.16.0 built by: WinDDK
Description : Sierra Wireless USB MUX Driver
Copyright : Copyright Sierra Wireless Inc. 2006
Product Version : 1.0
Product Name : Sierra Wireless USB Modem
Company Name : Sierra Wireless Inc.
Internal Name : SWUSBMUX.SYS
File Size: 87936 byte(s) 85.896 KB
MD5 : 2256ae9055ef8a4e18bda96af72f970c
SHA1: 70DB3B5DC94FEAD221B0195A35676CAF5B6E6FC2

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