A HID (independent of how bus transport, be it usb, pci, 1394, Bluetooth, etc) mouse can be filtered via generic mouse class methods, e.g. Sunix usb devices driver download for windows. Wasp driver download. Moufiltr can be used for a HID, a ps2 mouse, a serial mouse, etc b/c it filters on the generic service callback infrastructure that mouclass uses. Install Alps Alpine Mouse Filter driver for Windows 10 x64, or download DriverPack Solution software for automatic driver installation and update.

[center]Understanding Device Drivers and Filters
(Or my original title: 'What the heck is a Windows Filter? And why you should care to know!')[/center][center][/center]
This post provides an introduction to help understand Windows drivers and filters
..> To learn how to easily view and get info about flters on your computer see [post=815752]'How to Find/View Filter Drivers on Your Computer'[/post]
..> For help to fix filter problems see [post=815753]'CD/DVD or Disk Problems? How to Fix Problems Caused by Filters'[/post]

It can be pretty darn frustrating when you have a Windows device that refuses to work
Does this sound familiar?
..> You have a hardware problem. You look in Device Manager to check devices
..> You see the problem device listed and its entry has a yellow icon. (The icon indicates a driver error. The device isn't working properly)
..> You uninstall/reinstall the driver. You Disable/Enable the device. Yet no matter what you do the driver error won't go away!
A possible (and often over-looked) cause of this problem is missing or corrupt filter drivers! (more simply called 'filters')
Filters are optional driver components. They're added to augment a driver's functionality. But fact is

• They don't always work. They can become corrupt or filter files go missing
• Bad filters can cause driver error codes and/or simply cause the device to not work right!
• The existence of filters is 'non-obvious'. Which is why filter related problems can be easily overlooked

Symptoms of Filter Driver Problems
Symptoms include:

• Devices (such as disks and CD/DVDs) that appear in Device Manager but not in My Computer or Explorer
• Computer can't detect a CD/DVD or can't write to writable media
• USB devices (such as iPods and Disks) that don't seem to get detected
  > Note there are still many other reasons for undetected USB devices
  > So try fixing filters but don't get hung up on filters as 'must be' the cause
• A persistent driver error code for disks, CD/DVDs or Sound/Media cards equal to: 10, 19, 31, 32 or 39
  > To see the error code in Device Manager, rt click the device and look on the General tab

Device Driver Overview

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To understand filters, we'll start with an overview and define some terminology
A device driver is software. The driver allows a Windows program to 'talk' to a hardware device thus allowing the program (and you) to use and take full advantage of all the device functions

Windows provides a 'layered' approach to device drivers (ever since Windows 2000). While you may think of a device driver as a single 'thing' (probably because you're used to seeing one single line entry per device driver in Device Manager) that single 'thing' actually consists of one or more pieces (i.e. 'layers')

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(see figure below and continue reading)
The Function Driver vs. Upper and Lower Filter Drivers
A Windows device driver consists of

• A single (and required) function driver
  > This is the device's main driver
• Zero or more (optional) filters
  > Filters intercept (and may modify) device I/O data Request Packets (IRPs) before and/or after the function driver processes them
  • Upper filters first intercept data requests before the function driver
    >> Upper filters typically provide added-value features for a device (examples later)
  • Lower filters first intercept data requests after the function driver
    >> Lower filters typically modify the behavior of the device hardware
    >> This may include translating proprietary communication into a standard language for the main driver

Device Name vs. Device Class
A filter can be installed for a specific device or device class. Every hardware device has a device name and belongs to a Windows device class
> The device name uniquely identifies the hardware device
> The device class indicates the type of device
Here's a few examples of pre-defined Windows device classes
Device Filters vs. Class Filters

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Filters can be installed and applied to a single device or applied to all devices of the same class

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• A device filter is device specific. It's applied to a single and specific device
• While a class filter is applied to every device in the class
  > So, a single class filter for class= DiskDrive is applied to and will affect every disk on the computer!

It's the class filters that can cause device problems! as they're typically from 3rd party vendors. Example

• You install a data backup product
• The product MIGHT install a class filter to intercept all the I/O to all your disk drives
• That single 3rd party class filter might not work well with one or more of your disks (and the disk's device driver)
• You can uninstall/reinstall all your disk drivers till kingdom come!
  > For this case, the problem with your disk doesn't go away till you finally uninstall and fix the disk drive class filter!

Examples of Filters

• Keyboard Upper Class Filter
  A keyboard upper filter may implement additional security checks and provide enhanced functionality when it intercepts, and possibly modifies the IRPs as they pass between an application or OS/module and the keyboard's function driver
  
• Keyboard Lower Class Filter
  A Keyboard lower filter may intercept physical keystrokes to 'clean-up' the key presses sent between the keyboard hardware and its function driver.
  • You may have only pressed the hardware key once, but internally, the key press may have made repeated physical electrical contact within a few milliseconds, sending more than one signal when only one was intended
  • A lower filter can recognize and clean-up the un-intended behavior, change the data stream received from the hardware and only forward 1 keystroke to the function driver
  • From the end-user's perspective, they only see a one key-press response. For the user, it looks like a simple one press per one character response
  
  
• Notes About the Keyboard Filter Examples
  • Note how a 'layered' approach to device drivers makes it easy to swap-out and change filter functionality
    > E.g. in above examples, simply change a filter to change how security is being applied or how multi-press keystrokes are handled
  • In the keyboard example, note that a simple change to upper filters can affect how security is applied to a keyboard and its standard device driver.
    > The filter change (and change in security) could be implemented without ever changing and no need to modify the keyboard function driver itself