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File Version : 5.2.3790.0 (srv03_rtm.030324-2048)
Description : Distributed File System Filter Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.2.3790.0
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : dfs.sys
File Size: 32256 byte(s) 31.512 KB
MD5 : 379d95c974f91b109b1178b76c76e1e3
SHA1: D7B9145E0A244ED6A3B7F0FFD45C8D69D8A098A4

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