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Dell Wyse Windows 10 IoT Enterprise for Latitude 5280 Mobile Thin Client Administrator’s Guide

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Unified Write Filter (UWF)

Upon system start, the Unified Write Filter utility is automatically started.

UWF File Folder exclusions:
  • C:\Users\Admin\AppData\LocalLow

  • C:\Users\User\AppData\LocalLow

  • C:\Program Files\Windows Defender

  • C:\Program Files (x86)\Windows Defender

  • C:\Windows\WindowsUpdate.log

  • C:\Windows\Temp\MpCmdRun.log

  • C:\windows\system32\spp

  • C:\ProgramData\Microsoft\Windows Defender

  • C:\program files\Wyse\WDA\Config

  • C:\Users\Public\Documents\Wyse

  • C:\Wyse\WCM\ConfigMgmt

  • C:\Wyse\WCM

  • C:\Wyse\WDA

UWF Registry Exclusions

  • HKLM\SYSTEM\CurrentControlSet\Control\WNT\DWCADTool
  • HKLM\Software\Wyse\ConfigMgmt
  • HKLM\SOFTWARE\Microsoft\Windows Defender
  • HKLM\SYSTEM\CurrentControlSet\Control\WNT\UWFSvc
  • HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\HomeGroup
  • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkList
  • HKLM\SYSTEM\WPA

Unified Write Filter (UWF) details: You can use Unified Write Filter (UWF) to protect your storage media. UWF intercepts all write attempts to a protected volume and redirects those write attempts to a virtual overlay. This UWF improves the reliability and stability of your device and reduces the wear on write-sensitive media, such as flash memory media like solid-state drives. In UWF, an overlay is a virtual storage space that saves changes made to the underlying protected volumes. UWF intercepts all modifications to any sector on a protected volume. A sector is the smallest unit that can be changed on a storage volume. Any time the file system attempts to modify a protected sector, UWF instead copies the sector from the protected volume to the overlay, and then modifies the overlay instead. If an application attempts to read from that sector, UWF returns the data from the overlay instead, so that the system maintains the appearance of having written to the volume, while the volume remains unchanged.

  • CAUTION:
    • It is recommended that Write Filter is enabled during normal use of thin clients. It disables only by administrator while making necessary changes. Extended use with write filters disabled can reduce the life of your flash drive. It is a good practice to enable write filter to ensure device security.

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