Did she have Bitlocker or FileVault or other disk encryption that was breeched? (Or they took the system booted as TLAs seek to do?)

There was a story here the other day, bitlocker keys stored in your Microsoft account will be handed over.

This has been known for a while, though I don't know if your typical layperson was aware until recently. People need to remember that any access a company has to a device, so does LE with a warrant. Even moreso once you get into federal resources and FISA courts.

Which windows does by default and makes it hard to turn off

Bitlocker isn't secure, for several reasons, that I won't get into on here.

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breached

Ha, no, shoved down someone's trousers! ;oP