The SA uninstall/reinstall - Dell Community process was used and Blue Screen Stop Code - BAD_POOL_CALLER appeared. Support for Alienware 17 R5 Drivers & Downloads, Check for Updates attempted to install SupportAssist and Blue Screen Stop Code - BAD_POOL_CALLER appeared. 

Blue Screen Stop Code - BAD_POOL_CALLER

How did you get the MSI files for a later version which is yet to be relased ??? 

its never shared by Tech support to customers? Once I asked for them and SA developer denied for it. 

Anyways let me know if this old fix works for you. 

Open device manager > system devices: If you see 2 Dell data volt devices, please uninstall the second one.
Reboot

Uninstall SupportAssist and this time you shouldn't get Blue screen.

Reboot 
install SupportAssist

If installation fails again you will have to remove supportassis

Hi @XPS_Man  thank you for sharing a possible fix. 

The Dell SupportAssist application installation files are unpacked and placed in a temporary folder, that then disappears when SupportAssist installation is terminated. I took the opportunity to create copy of the temporary folder and its contents. C:\xxx\xxx\AppData\Local\Temp\SupportAssistAgent\AutoUpdate 

The 17 R5 Device Manager > System Devices does not include any Dell data volt devices. 

Dell SupportAssist application and its other supporting applications listed in SA uninstall/reinstall - Dell Community have all been completely removed by Revo Uninstaller Free. The SupportAssist installation Issue did not get fixed. Incorrect Dell automation always tries to install the most recent version for the system. Unfortunately the 17 R5 system does not have what the SupportAssist update wants and Blue Screen Stop Code - BAD_POOL_CALLER is created. I do not have the option to install Old version of SupportAssist. Dell Technical Support has the administration privilege. @DELL-Cares 

Dell devs told me never to use Revo for Supportassist issues, it makes thing worse. 

Try this MSFIXIT in Normal mode and if no go in safe mode. 

Fix problems that block programs from being installed or removed (microsoft.com)

Hi @XPS_Man thank you for sharing your discussion with Dell Devs. 

When my Alienware 17 R5 visits Warranty and Service Extension - Dell Community it says "Your device has reached the end of service life and can no longer be renewed, upgraded, or extended." So Dell Technical Support does not assist this user that does not have a Dell warranty. 

The Revo Uninstaller Free removes everything, including left over registry entries. So I do not understand why Dell Devs should say that Revo Uninstaller Free should not be used. 

The "Program Install and Uninstall Troubleshooter" was previously used, but it says there are no SupportAssist Install Issues. 

Safe Mode does not reveal any SupportAssist Issues. SupportAssist update gets the files, etc. and completes the install process, but then says SupportAssist Installer is unable to complete the installation. There is no Dell explanation or error code. 

Windows Reliability Monitor reports a SupportAssist event but its content is empty and not reported to Microsoft, so the root cause of the Blue Screen is not revealed. This is very perplexing. 

Trying to install SupportAssist in safe mode + internet, is just a repeat of trying to install SupportAssist in normal mode. Alienware 17 R5 does not have what this SupportAssist version update wants. Option to install Old SupportAssist version not available, because Dell has automatically arranged to always install most recent SupportAssist update version. 

SupportAssist application update fails to installSupportAssist update failsSupportAssist installation fails

I missed the fact you are on an Alienware machine. 

For Alienware's Dell client management service is used for AWCC, SupportAssist, My Alienware App and Alienware updates (dell update's alienware version) 

Ensure you have all the permission on C:Program data folder. Remove all the apps from mentioned above, Ensure that Dell client management services (may show as Alienware client  management) and Dell hardware services are no longer Present in Services.msc (reboot may be needed) and try again, 

AT this point, considering the amount of time you have invested in this, OS reinstall could have been a better solution. 

Hi @XPS_Man  thank you for sharing your suggestion, but this did not fix this problem. SupportAssist x64 update v3.11.2.143 does not find what it wants and installation fails (again). Dell auto install most recent version prevents installation of Old SupportAssist version that worked. I suspect that this new SupportAssist update version is not compatible with the 17 R5 system, a Dell Quality Assurance problem. 

Installer log says SupportAssist download/installation failed with return code: msiinstallationfailed. 

I am working-from-home and it's just too much trouble to reinstall the Windows 10 Pro v21H2 operating system and all my applications again. 

I have an Optiplex 740 and I am getting exactly the same problem.   SupportAssist tells me there is an update version 3.11.2.143 but when I download it, I get a failed installation message.  I suspect this is a more general Dell Quality Assurance problem and not just an Alienware one.