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File Version : built by: WinDDK
Description : Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller(NDIS6.20)
Copyright : 2001-2008 Atheros Communications, Inc. All Rights Reserved.
Product Version :
Product Name : Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller(NDIS6.20)
Company Name : Atheros Communications, Inc.
Internal Name : L1E62x86.sys
File Size: 47104 byte(s) 46.0 KB
MD5 : 8c804b1ffad1efa952b747e8285c3b76
SHA1: 8B710B28A65DA8468BAE0A97C80B0C1EFA9BE8EB

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