Downgrade TPM 2.0 to TPM 1.2 for Dell Devices

Dell devices with TPM at the 2.0 level will not build on legacy BIOS systems.

A solution around this is to downgrade the TPM to 1.2 level.

This can be done using the Dell provided TPM firmware update utility.

Have a look here for the details: http://en.community.dell.com/techcenter/enterprise-client/w/wiki/11850.how-to-change-tpm-modes-1-2-2-0