There is (or at least used to be) a debug command to write-protect a hard drive. No idea what it’s for or why such a thing exists, but you flip a certain bit from 0 to 1 and drive no write. I won $100 once at work with this knowledge. We had a training course about how much better the new version of windows at the time was and how much harder it was to break - so hard they’d pay $100 (in early 2000s money) to anyone who could unrecoverably break their demo windows install during the 10 minute presentation. The instructor (who worked for Microsoft) said he’d been doing this for 6 months and they’d never had to pay out that prize before, much less 30 seconds in.
There is (or at least used to be) a debug command to write-protect a hard drive. No idea what it’s for or why such a thing exists, but you flip a certain bit from 0 to 1 and drive no write. I won $100 once at work with this knowledge. We had a training course about how much better the new version of windows at the time was and how much harder it was to break - so hard they’d pay $100 (in early 2000s money) to anyone who could unrecoverably break their demo windows install during the 10 minute presentation. The instructor (who worked for Microsoft) said he’d been doing this for 6 months and they’d never had to pay out that prize before, much less 30 seconds in.
Sounds like something registry editor related.