Big coup for Microsoft.
Large private company donation of processors helped project.
Admits error was meant to be a factory test.
But major changes to security policy unlikely following incident.
Insiders say record-breaking deal will go ahead.
How it will run air conditioners for only three months a year.
Cost again the stumbling block.
Brandis tells tech giant to comply with court orders.
But Penn remains upbeat about the future.
Nineteen already built.