Windows 10 IoT Persistent Wi-Fi

It appears that an MS hotfix applied to the Nov 19 RS1 and the RS5 builds break the UWF wireless exceptions we previously used. Below is a potential workaround.

The root cause appears to be an MS update that prevents the creation of the C:\ProgramData\Microsoft\wlansvc\Profiles\Interfaces folder while the write filter is on.  The workaround is to create this folder while UWF is off.  The following steps/commands can be used to create the required folder and add the UWF exclusions for keeping Wi-Fi settings with UWF enabled:

• Install WDA 14.3.0.66 via Wyse Management Suite (WMS) or locally in Admin Mode
• Login as Admin on device
• Open Command Prompt with Administrator rights
  md “C:\ProgramData\Microsoft\wlansvc\Profiles\Interfaces”
• uwfmgr.exe filter enable
• uwfmgr.exe registry add-exclusion “HKLM\SOFTWARE\Policies\Microsoft\Windows\Wireless\GPTWirelessPolicy”
• uwfmgr.exe registry add-exclusion “HKLM\SOFTWARE\Microsoft\wlansvc”
• uwfmgr.exe registry add-exclusion “HKLM\SYSTEM\CurrentControlSet\services\Wlansvc”
• uwfmgr.exe registry add-exclusion “HKLM\SYSTEM\CurrentControlSet\services\WwanSvc”
• uwfmgr.exe file add-exclusion “C:\Windows\wlansvc\Policies”
• uwfmgr.exe file add-exclusion “C:\ProgramData\Microsoft\wlansvc\Profiles\Interfaces”
• uwfmgr.exe filter disable
• Close Command Prompt, then click Green Icon to enable unified Write Filter, doing so will reboot the system.
• Login as USER if the device doesn’t log in automatically.
• With ethernet cable disconnected, click on Wireless service in taskbar tray and add network.
• To test the persistence of connecting reboot device.