Once you have restored TPM detection, prevent it from vanishing again:
Before we fix the problem, we must understand the hardware. The Dell Vostro 5568 (circa 2016-2017) does not have a discrete TPM 2.0 chip soldered to the motherboard in all configurations. Instead, it relies on Intel Platform Trust Technology (PTT) – a firmware-based TPM embedded within the Intel Chipset (usually 6th or 7th Gen Intel Core).
When the BIOS loses configuration or a Windows update corrupts the security stack, the PTT fails to initialize, resulting in the dreaded "not detected" status. dell vostro 5568 tpm device not detected extra quality
Run gpedit.msc and navigate to:
Computer Configuration → Administrative Templates → System → Trusted Platform Module Services.
Enable “Turn on TPM backup to Active Directory Domain Services” – even if you don’t use AD. This forces the TPM service to actively poll the hardware, often waking a “sleeping” chip.
Clearing the TPM can sometimes resolve issues related to it. Once you have restored TPM detection, prevent it
Alternatively, you can clear the TPM from within Windows:
If you have performed the NVRAM drain, re-seated connections, and updated BIOS, and the TPM is still not detected, the diagnosis points to Intel PTT Hardware Failure. When the BIOS loses configuration or a Windows
On the Vostro 5568, the TPM is not a separate plug-in module; it is integrated into the Intel Chipset/PCH (Platform Controller Hub). If this hardware fuse has blown or the PCH has failed:
Most online forums suggest three things:
Why these fail for the "extra quality" case: The Dell Vostro 5568 has a known bug where a fast power state transition (Sleep → Wake) or a dead CMOS battery causes the PTT flag to become "hidden" from the OS. Standard drivers won't fix a hidden hardware flag.