Vista error: "Trust relationship between this workstation & primary domain failed"

My Vista lab box presented this error when I tried to login into my company’s domain after several months of not doing so:

Trust relationship between this workstation & primary domain failed

I suspected my [Vista] installation was using cached domain information to login, which was the case and why it was being denied access.  This is because a computer that is not active for a certain period, is usually removed as a member of the domain. 

If you encounter this, you’ll need to rejoin the computer to the domain via My Computer > Properties > Computer Name > Change (you may need Help Desk/IT to do it for you).

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