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File version : 5.2.3790.0 built by: WinDDK
Description : BulkUsb Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 5.2.3790.0
Product Name : Windows (R) Server 2003 DDK driver
Company Name : Windows (R) Server 2003 DDK provider
Internal name : bulkusb.sys
File Size: 24064 byte(s) 23.512 KB
MD5 : 92b05b21ebd8ee383c267b1ef58b152e
SHA1: 77D99171F12954ACD745687E21BD91BED964321E

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