Dell.DCF.UA.Bradbury.API.SubAgent.exe Stopped Working Alienware x16 R2

Hi  @JuanCBriPer :

If you haven’t already done so, I would advise that you permanently DISABLE your Windows Fast Startup power option as instructed in Brink’s Eleven Forums tutorial Turn On or Off Fast Startup in Windows 11 (see <here> for Win 10) and then re-boot a few times to ensure the setting change takes effect. The Fast Startup power option (also known as hybrid boot-up / hybrid shutdown) is enabled by default in Win 10 and Win 11 but it can sometimes interfere with the loading and initialization of drivers and services at boot-up and cause all sorts of unexpected glitches and problems with a wide range of software, including Windows Update.

If SupportAssist still does not run correctly after Fast Startup is disabled then view your Windows Services at Start | Windows Administrative Tools | Services and confirm that the Dell Client Management Service (which might be called Alienware Client Management Service on your system) has a Startup Type of Automatic [or Automatic (Delayed Startup)] and a Status of "Running".  Dell / Alienware Client Management Service is a shared service used by multiple Dell utilities like Support Assist, AWCC, Dell Update for Windows Universal, etc. When one of these programs is updated this service must temporarily shut down to finish the update, but sometimes that service does not restart correctly after the installer has run to completion, even after a complete system shutdown and re-boot . From my Inspiron 15 5584 *** :

*** NOTE that I uninstalled SupportAssist, Dell SupportAssist OS Recovery Tools (also known as Dell SupportAssist Remediation and/or System Repair) and the Dell SupportAssist OS Recovery Plugin for Dell Update from my Inspiron 15 5584 because I found these programs were too buggy and consumed too much RAM and CPU - see my 22-Mar-2023 post in my topic Dell SupportAssist OS Recovery Plugin for Dell Update Rolled Back to v5.5.4.16189 for further details.

If that doesn't help then please post back and tell us your Windows operating system, your SuportAssist version number, your .NET Desktop Runtime 6.0.x version (a prerequisite for SupportAssist v4.x - see the minimum system requirements for v4.0.x <here>), and if you have another Dell update utility like Dell/Alienware Update for Windows Universal v4.8.0 installed on your system.

The current SupportAssist v4.0.3 has several known bugs - see employee DELL-Chris M's 10-Jun-2024 SupportAssist, "Hardware scan fails", "We ran into a problem" for more information.  If nothing I've suggested above helps then your best option might be to simply wait for Dell to release a newer version of SupportAssist as suggested by DELL-Chris M.
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.4894 * Firefox v130.0.1 * Microsoft Defender v4.18.24080.9-1.1.24080.9 * Malwarebytes Premium v5.1.11.133-1.0.5048 * Macrium Reflect Free v8.0.7783 * Dell Update for Windows Universal v5.4.0 * My Dell v2.2.6.0