Hello,
I upgraded from TPM 1.2 to TPM 1.2 latest version with the “Dell TPM 1.2 Firmware Update Utility” everything went fine but since then, Windows 10 doesn't see the TPM anymore.

since with a Get-TPM
TpmPresent : False 
TpmReady : False 
TpmEnabled : False 
TpmActivated : False 
TpmOwned : False 
RestartPending : False 
ManufacturerId : 0 
ManufacturerIdTxt : 
ManufacturerVersion : 
ManufacturerVersionFull20 : 
ManagedAuthLevel : Full 
OwnerAuth : 
OwnerClearDisabled : True 
AutoProvisioning : NotDefined 
LockedOut : False 
LockoutHealTime : 
LockoutCount : 
LockoutMax : 
SelfTest:

I tried to update to the version 2.0 with “Dell TPM 2.0 Firmware Update Utility”
it indicate  “Error: The System TPM Query Failled, Aborting” and “Error: Unable to prepare the TPM update payload.”
how to update to version 2.0 or revert to a working version 1.2.
Sincerely

Pascal