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File Version : 4.00
Description : SCSI Tape Driver
Copyright : Copyright (C) Microsoft Corp. 1981-1996
Product Version : 4.00
Product Name : Microsoft(R) Windows NT(TM) Operating System
Company Name : Microsoft Corporation
Internal Name : 4mmdat.sys
File Size: 10320 byte(s) 10.80 KB
MD5 : 5e9836552090530d3a24f8527ebaa483
SHA1: EDBE0568C9D2F34733056A0203B5E1619418A8E2

Download _4MMDAT.SYS
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How to Install _4MMDAT.SYS
Repair Sys ProblemsFixing a corrupted or missing _4MMDAT.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.