This checklist is based on https://www.dell.com/support/kbdoc/en-us/000103639/how-to-troubleshoot-and-resolve-common-issues-with-tpm-and-bitlocker#TPM_failure

SYMPTOM: Dell Optiplex 7000 Series reboots and returns a boot failure and asks user to press F1 to retry.

• Ensure the drive is not Bitlockered. If it is, remove Bitlocker and allow to decrypt. 
• Shutdown computer 
• Remove power input for >/= 30 seconds 
• Plug power input back in 
• Startup computer 
• "F1" prompt should not come up. If it does: REPEAT 30 second power removal and retry 
• Login to Windows 
• Run Admin Powershell and perform "get-tpm" command 
• If TPM is now "visible" to system you should see a table with information filled in. 
• While still in Admin Powershell, perform "Disable-TpmAutoProvisioning" 
• Run (Windows-R) tpm.msc 
• Select Clear TPM 
• Reboot when prompted 
• Download the latest TPM 2.0 firmware for this Dell system 
• Install (Restart Required) 
• After restart, run Admin Powershell and perform "Enable-TpmAutoProvisioning" 
• Restart computer 
• Verify that TPM is enabled and ready for use by Running (Windows-R) tpm.msc and reviewing the data. 
• Complete the procedure by sipping on your Tall Mocha with Extra Shot, no Whip and a twist of lime