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File Version : 5.10.3020.0
Description : USB RF-Mouse filter driver
Copyright : Copyright (C) A4Tech Co.,Ltd. 2001-2004
Product Version : 5.10.3020.0
Product Name : A4Tech iWheelWorks Mouse Driver
Company Name : A4Tech Co.,Ltd.
Internal Name : Amusbdev.sys
File Size: 7424 byte(s) 7.256 KB
MD5 : 94425c694facf0ec605b2b81322ac68a
SHA1: D27D0EAA380687FC34F20C5DE480381A92306060

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