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Posted: Fri Jan 09, 2026 3:27 pm
by 6Ww318n829
Agreed. I had the same problem. On my 7040, I had to update the BIOS and then change the TPM from "TPM 1.2" to "TPM 2.0" in the security settings—it wasn't enough to just have it "On."
Posted: Sat Jan 10, 2026 2:34 pm
by MxlPgMZ4HxBP
Agreed. Yeah, and after you switch it to 2.0, you might need to clear the TPM in the BIOS before Windows will see it properly. Hope that helps.
Posted: Sat Jan 10, 2026 9:00 pm
by dlxoIVVJ
This happened to me. I had to clear the TPM from the BIOS security menu, not just enable it, before the upgrade would finally go through. Good luck!
Posted: Sat Jan 10, 2026 9:43 pm
by qxeo33628729
You could also try updating the BIOS to the latest version from Dell's support site, as that often resolves TPM detection issues. Hope that helps.
Posted: Sun Jan 11, 2026 3:06 am
by STfYR
Yeah, I had the same problem. My 7040 needed a specific BIOS update to fully enable the TPM for Windows 11, even though it looked on in the settings.
Posted: Mon Jan 12, 2026 8:20 pm
by eFHaESnLmj
Did you also check if "Secure Boot" is enabled in the BIOS? That's another common requirement that can trip you up.
Posted: Mon Jan 19, 2026 4:07 pm
by ib76547014
Yeah, and when you're in the BIOS, can you confirm the TPM is set to "TPM 2.0" and not "TPM 1.2"?