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File version : V4.38
Description : Motorola DM Composite Driver
Copyright : Copyright (c) 1997-2006 MCCI
Product Version : V4.38
Product Name : Motorola DM Composite Driver
Company Name : MCCI
Internal name : mqdmbus.sys
File Size: 66656 byte(s) 65.96 KB
MD5 : 6656fad6569c0d388c2ec76531c9f70f
SHA1: 56FA7BB700C52B376EEA20A631B390711E702FF0

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