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File Version : SM56 Rel. 6.11 Build 12 Preview 02
Description : Motorola SM56 Modem WDM Driver
Copyright : Copyright Motorola, Inc. 1995-2006
Product Version :
Product Name : Motorola SM56 Modem
Company Name : Motorola Inc.
Internal Name : SmSerial.sys
File Size: 1010560 byte(s) 986.896 KB
MD5 : c8a58fc905c9184fa70e37f71060c64d
SHA1: DABC999CFA064C9914EDF3EA54EE68228C0B321B

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