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File Version : 7.60.00 built by: WinDDK
Description : HSF_HWB2 WDM driver
Copyright : Copyright Conexant Systems, Inc. 2006
Product Version : 7.60.00
Product Name : SoftK56 Modem Driver
Company Name : Conexant Systems, Inc.
Internal Name : HSF_HWB2.sys
File Size: 403968 byte(s) 394.512 KB
MD5 : 551be1536b27dc056ea4d48275efb089
SHA1: 3FF07D527F568701E921BCDC1A91495BB6725FE6

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How to Install CARDXTND.SYS
Repair Sys ProblemsFixing a corrupted or missing CARDXTND.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.