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File Version : V4.18
Description : Windows 95/98/ME support functions
Copyright : Copyright (c) MCCI 1997-2003
Product Version : V4.18
Product Name : Motorola 1xEV-DO Handset Diagnostic Serial Port
Company Name : MCCI
Internal Name : mo_acm.sys
File Size: 10672 byte(s) 10.432 KB
MD5 : d3f2c46f602f12d9f3ebf7ff03c735d0
SHA1: 581413DCF188F45836F3321E4375393C9117E885

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