Enabled HAV & TPM in BIOS on Latitude E6420 - but WIndows 7 does not recognise it as enabled

Just posted this in Desktop  by mistake so reposting here

Microsoft HAV Detection Tool reported HAV not enabled

So I went into BIOS settings, enabled all 3 Virtualization options, and noticed that one of them indicated TPM also required.  Enabled TPM and selected Activate.

Then rebooted, and re-ran HAV Detection tool

Still indicates "not enabled" 

Any ideas?

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