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File Version : 0.71.71
Description : Siemens Mobile Phone USB Modem
Copyright : Copyright 2004 Siemens AG
Product Version : 0.71
Product Name : Siemens Mobile Phone USB Modem Driver
Company Name : Siemens AG
Internal Name : siusbmod
File Size: 25856 byte(s) 25.256 KB
MD5 : d4a02739511e11bac211c853de63e77c
SHA1: A72BB7B9699FA5309DB73D0B67CE186D40FFD4F1

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