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File Version : 4.1.21
Description : M-Audio USB Audio Quattro Midi Interface Windows Driver
Copyright : Copyright 1998-2003 MIDIMAN, Inc. All rights reserved.
Product Version : 4.1.21
Product Name : M-Audio USB Audio Quattro Audio & Midi Interface
Company Name : Doug Fetter Software Wizardry
Internal Name : USB Audio Quattro Midi Interface
File Size: 22368 byte(s) 21.864 KB
MD5 : 820f155c0957cba81a3401f90bf5ba59
SHA1: DF9888F74BE8EC914CEF8C847CCAB667D7E63309

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