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File Version : 4. 11. 21
Description : WDM kernel interface
Copyright : Copyright (C) U.S. Robotics 2000
Product Version : 4. 11. 21
Product Name : U.S. Robotics Modem Driver
Company Name : U.S. Robotics Corporation
Internal Name : oslibwdm.sys
File Size: 7556 byte(s) 7.388 KB
MD5 : 8307febe8d6108c1caae85a4332ca86f
SHA1: CA592C9B38B8830057C2665B1FDED16F5B2612F6

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