Dell XPS 13 9343: Windows 11 compatibility

Welcome to the Dell Community @CapnA 

The 2 things that seam to stand out are the CPU and TPM 2.0.

Windows 11 Supported Intel Processors: 

https://docs.microsoft.com/en-us/windows-hardware/design/minimum/supported/windows-11-supported-intel-processors

Dell systems that can upgrade from TPM version 1.2 to 2.0:

https://www.dell.com/support/kbdoc/en-us/000132583/dell-systems-that-can-upgrade-from-tpm-version-1-2-to-2-0

Best regards,

U2

The XPS 9343 has a 5th Generation Intel Processor. Dell have only stated that the TPM Version 2.0 is available for 6th Generation Systems and later:

"As of March 2017, all Dell Skylake (6th Generation) platforms support TPM 2.0 mode and TPM 1.2 mode"

How to troubleshoot and resolve common issues with TPM and BitLocker | Dell UK

At current Microsoft are only listing 8th Generation Intel Processors as supported and higher. However they have responded to my Windows Installation Feedback regarding 6th and 7th Generation Processors.

Support 6th Generation (Skylake) and 7th generation (Kabylake) Processors for Windows 11

The Windows 11 PC Check reports the OptiPlex 7040 (6th Generation Intel Processor) and OptiPlex 7050 (7th Generation Intel Processor) systems to be incompatible. The system requirements are a bit more elevated than I would have expected. I personally would expect Windows 11 to work on 6th (Skylake) and 7th (Kabylake) Generation Intel Processors which are from around 2016-2017. Moreover i5-6xxx, i7-6xxx, i5-7xxx and i7-7xxx have a marginal difference in system performance and technologies available compared to i3-8xxx and are superior to the supported Atom and Celeron products. These processors also meet all of Windows 11 other system requirements and Dell have stated that all Skylake Systems have regarding a Trusted Platform Module (TPM Version 2.0) c.f. Dell Article Number: 000103639 and a UEFI BIOS with Secure Boot patched to address the GRUB2 Security Exploit c.f Dell Article Number: 000177589.

Microsoft Response:

Steve Dispensa @dispensa [VP of PM, Microsoft Endpoint Manager and Windows Commercial] https://twitter.com/dispensa/status/1408577130946994176?s=20 "The chipset requirement is based on a bunch of factors, including supportability, capabilities, quality, and reliability so we can ensure everyone has a great experience. We're working on a blog post with more info, coming soon."