Bitlocker Problems

I have a Thinkcentre desktop.  I wanted to enabled bitlocker, so I activated the TPM chip in bios, ran the bitlocker wizard.  I checked the system check box, rebooted, and after the reboot I get an error:  "Bitlocker could not be enabled.  The TPM was unable to unlock the drive.  Either the system boot information has changed after choosing bitlocker settings or the PIN did not match....".

At any rate, I have successfully enabled this on several machines and understand how it works overall.  I'm at a loss, and Lenovo tech support isn't much help.  Does anyone have any suggestions?  And yes, I updated the BIOS as well.
josephgrandjeanAsked:
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josephgrandjeanConnect With a Mentor Author Commented:
I figured it out.   I made the hard drive the first boot drive in BIOS and I was able to bitlock the drive.  I didn't think that was a requirement, but that did the trick.
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McKnifeCommented:
No clue. But I do recommend to check encryption without the TPM. Set the policy for requiring a USB key and use it, so that we at least know that that works.
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Henk van AchterbergSr. Technical ConsultantCommented:
in windows, hit windows key + R (run) and type tpm.msc.

from there reset (reinitialize) the tpm chip.

when that fails please go in your bios and try to reset the TPM from there.
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josephgrandjeanAuthor Commented:
I figured it out...
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