[NAME]  You did not say what country you were in when you downloaded the bios update. TPM is listed for the model. However TPM: Not available in all regions. [URL] TPM of ANY kind is not allowed outside the US in embargo'd countries outside the US and EU. The Office of Foreign Assets Control ("OFAC") of the US Department of the Treasury administers and enforces economic and trade sanctions based on US foreign policy and national security goals against targeted foreign countries. So the error may not be an error at all but rather a government mandate. Dell support may help but they will need service tag and proof of ownership. [URL] DO NOT post that info here. [NAME]-Cares  will ask for service tag  and owner information before providing support. There is also a service charge if the system is not still under warranty. [IMAGE]
PC has been working fine for about 4 years. Last thursday, at boot, I got a BIOS error message "Alert - TPM Device is not detected", and options to "Continue" "EnterBIOS" "Diagnostics". I tried continue, and the PIN code option for Windows 10 would not work, but entering the password gave me a working PC. Found the BIOS was on version 1.15, and 1.16 was available, so upgraded the BIOS to 1.16. The alert problem continued. Tried resetting the BIOS to BIOS defaults and Factory defaults. Did not fix it. Ran the Dell Diagnostics, and that said BIOS 1.17 was available, so updated again. Still not fixed. Looked around on the internet, and checked in the BIOS where under "Securiy" there is no TPM sub-section, so it looks like the TPM has failed? Any ideas? Thanks in advance for any input. I'm using the PC at the moment without TPM. Ray
Optiplex 3050 Mini Tower - TPM disappeared from BIOS