Exercise 3: Why "Roll Back Driver" Worked This Time — Possible Solution
====================================================================

WHAT CHAPTER 7's OWN WORKED EXAMPLE DESCRIBED
------------------------------
Per Chapter 7's own warn-box, "Roll Back Driver" is grayed out
"whenever no previous driver package is stored - either because... a
second update has since replaced the one rollback would have restored,
or because a cleanup pass... removed the stored copy." In that
chapter's own scenario, two weeks had passed since the driver update -
enough time for the button to become unavailable.

WHY THIS CAPSTONE's SCENARIO IS DIFFERENT
------------------------------
Per this chapter's own Step 6, "the update was recent enough that
Windows still has the previous driver package stored." Here, the BSOD
happened "this morning, right after a Windows Update" - meaning the
driver update that caused the problem had just occurred, with no time
for a second update or a cleanup pass to have removed the one stored
previous driver version Windows keeps on hand.

WHY THE TIMING IS THE KEY DIFFERENCE, NOT A DIFFERENT MECHANISM
------------------------------
Both scenarios rely on the exact same underlying mechanism Chapter 7
described - Windows storing exactly one previous driver package for
rollback purposes. Chapter 7's own example failed because enough time
(and likely another update) had passed since the original change;
this capstone's scenario succeeds because the rollback was attempted
immediately, before anything could have overwritten or cleared that
one stored copy.

WHY THIS MATTERS FOR HOW BOTH SITUATIONS SHOULD BE UNDERSTOOD
------------------------------
This isn't Windows behaving inconsistently or the rollback feature
somehow being "more available" this time - it's the same feature,
with its own known time-limited availability (as Chapter 7 explicitly
described), simply caught within its available window here rather than
past it. The practical lesson is that acting quickly after a
driver-related problem, rather than waiting, meaningfully increases the
odds that Roll Back Driver will still be an option.

WHY THIS WORKS AS AN ANSWER
------------------------------
It restates Chapter 7's own explanation for why the button can become
unavailable over time, contrasts that directly against this capstone's
own immediate-response timing, and clarifies that both scenarios
reflect the same underlying mechanism rather than a different or
inconsistent one.