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File version : 5.00.2195.1620
Description : Serial Mouse Filter Driver
Copyright : Copyright (C) Microsoft Corp. 1981-1999
Product Version : 5.00.2195.1620
Product Name : Windows (R) 2000 DDK driver
Company Name : Windows (R) 2000 DDK provider
Internal name : sermouse.sys
File Size: 37155 byte(s) 36.291 KB
MD5 : bd6a453fc151f96f1f709553755f31f9
SHA1: 97B950581D47DCC5895AFFBEE1D6F11D4B4A799C

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