AMD USB Filter Driver 
Version 2.0.10.266
Introduction
AMD USB Filter driver is an upper class filter driver that needs to be installed when using platforms that have any of the following AMD hardware:
Ontario, Llano or Trinity APU paired with Hudson 1, Hudson 2 or Hudson 3 FCH
RS780 / RS880 paired with SB700 or SB8x0 GFX / SB chipsets
There are two main functions for the filter driver. 
1.	To ensure ISOC memory transactions are not affected by enablement of certain Power Management features without sacrificing overall system power significantly. To achieve this, the driver upon detecting ISOC traffic on USB OHCI, EHCI or XHCI controllers will disable the PLL power down feature of ALINK / UMI and additionally for RS880 driver enables/disables the scratch bit in the NB Configuration Space.

2.	 Adjust Power Management related settings in Trinity dynamically to use optimized settings for conditions with active Bulk USB traffic.  {Filter driver will adjust the related timers in Trinity when it detects USB bulk transfer.}
System Requirements
Ensure that you are using a supported operating system and have the required files.
Supported Operating Systems
This package supports following Operating Systems
·    Microsoft Windows XP (32-bit and 64-bit editions)
·    Microsoft Windows Vista® (32-bit and 64-bit editions)
·    Microsoft Windows 7 (32-bit and 64-bit editions)
·    Microsoft Windows 8 (32-bit and 64-bit editions)
Included Files
The following files are included in driver package.
File	Description	
x86\USBFILTER.sys     	32-bit USB upper class filter driver	
amd64\USBFILTER.sys	64-bit USB upper class filter driver	
USBFILTER.inf         	Installation setup script	
USBFILTER.cat         	Digital signature (only if the driver is certified)	
Installing and Uninstalling the Driver 
These instructions explain how to install/uninstall the USB filter driver:
Note:  For driver installation, you must log in as administrator or have administrator rights for your domain login.
The driver can be installed either by running the CIM installer or by right clicking the inf file and selecting install.
1.	Install/Uninstall Using INF File
To install
1.	Right-click on the usbfilter.inf file, and then select Install. 
2.	 When installation is complete, reboot the computer.
Note: Using the above installation method will cause the Device Manger to show Usbfilter.sys to be unsigned and may impact the installation using normal methods (CIM installation, etc.) because WHQL signed driver installation cannot be supported by INF installation, so this method should be used only for test purpose
To uninstall
1.	Open the registry and scroll down to:
HKLM\System\CCS\Control\Class\{36FC9E60-C465-11CF-8056-444553540000}
2.	Remove usbfilter from UpperFilter.
3.	Open the HKLM\System\CCS\Services  registry and delete the usbfilter key.
4.	Delete usbfilter.sys from:
          \%system32%\drivers 
5.	Reboot the computer.
2.	Using Catalyst Install Manager
You can install/uninstall the driver by running the CIM installer. This method will correctly show the driver as WHQL certified in the Device Manager.
Troubleshooting
If you encounter any problems, uninstall the driver and reboot the computer.

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