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File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Description : Link-Layer Topology Mapper I/O Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16385
Product Name : Microsoft Windows Operating System
Company Name : Microsoft Corporation
Internal Name : LLTDIO.SYS
File Size: 48128 byte(s) 47.0 KB
MD5 : f7611ec07349979da9b0ae1f18ccc7a6
SHA1: B620FB085A183F0E0D0B825CD3BF1D2B907299CD

Download K320bus.sys
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How to Install K320bus.sys
Repair Sys ProblemsFixing a corrupted or missing K320bus.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.