Dell M6500 "The TPM could not be initialized"

Try pressing F2 to go to into the BIOS setup, find the "TPM Security" section, and click the button (or check the box) that says "Clear", then apply/save settings and exit.  If that doesn't work, the TPM might be damaged, and that wouldn't be a simple fix since it's soldered onto the motherboard.  But the only common reason to use a TPM is for BitLocker, which requires a Pro version of Windows 8 or newer (or an Enterprise/Ultimate version of Windows 7).  If you don't have any plans to use BitLocker, then you can disregard this, and you may even be able to get rid of that error message by disabling the TPM entirely in the BIOS so that you don't constantly have your boot process interrupted.

You might look in the windows\system32 folder for "tpm".   There are several utilities which you might be able to use.  I have used the tpm.msc to clear it but there is also one which may initiate it.

After I used tpm.msc, it can not find TPM.