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Agreed, clearing the TPM is key. One extra tip: after you enable it in BIOS, make sure to save and exit completely, not just restart.

I had the same problem with a 7040. For me, the TPM option was weirdly buried under "Security > PTT" in the BIOS, not labeled as TPM.

You could also try updating the BIOS to the latest version from Dell's support site, as that can sometimes enable the proper TPM support. Let me know if that works.

Yeah, that's a solid suggestion. Also, double-check that the TPM isn't hidden under a weird name like "Intel PTT" or "AMD fTPM" in your BIOS settings. Hope that helps.

Can confirm. And just to be sure, is your BIOS itself fully updated? Sometimes that unlocks the setting.

Yeah, that's a good call. Also, double-check that the TPM isn't hidden under a weird sub-menu like "PTT" or "Security Device" in your BIOS. Hope that helps.

You could also try using a third-party tool like Rufus to create a Windows 11 installer that bypasses the TPM check.

Yeah, that's a solid workaround. Just be aware that bypassing the check means your system won't be officially supported by Microsoft for updates or fixes.

This. You could also try using a third-party tool like Rufus to create an installation USB that bypasses the TPM check during setup.

+1 I had the same problem with an older Optiplex. For me, the TPM setting was buried under a weird "PTT" option in the security menu that I had to enable.