If humans were still around after being sent back to the stone age (without 100% infrastructure destruction), how long would it take to figure out how to generate enough power to boot a computer? I would hope that there are enough humans who know what electricity is even at a basic level to be able to get some generators running within a couple of years. Even still, there should still be a few power sources left that would just require fuel and the flip of a switch.
If it's catastrophic enough that the event destroys all of our computers and generators forever, I would be doubtful that humans would still be around in any capacity where knowledge would be an important factor.
If it's catastrophic enough that the event destroys all of our computers and generators forever, I would be doubtful that humans would still be around in any capacity where knowledge would be an important factor.