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File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Description : DFS Namespace Client Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16385
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : dfsclient.sys
File Size: 78336 byte(s) 76.512 KB
MD5 : 8e09e52ee2e3ceb199ef3dd99cf9e3fb
SHA1: AC4D5E92D8627C8529370C6E6B8E8060EEC9FB5B

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