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File Version : 4.1.21
Description : M-Audio Audiophile USB Midi Interface Windows Driver
Copyright : Copyright 1998-2003 MIDIMAN, Inc. All rights reserved.
Product Version : 4.1.21
Product Name : M-Audio Audiophile USB Audio & Midi Interface
Company Name : Doug Fetter Software Wizardry
Internal Name : Audiophile USB Midi Interface
File Size: 22336 byte(s) 21.832 KB
MD5 : 7d284ab1a3a69dde341f2cee785b8efd
SHA1: F92C5E76D7314822E05F2A297773737D376D1EE2

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