[AshamedCaptain]

> out on NT defragment happened in real mode so there isn’t a lot of memory to buffer copied blocks

NT cannot run anything in real mode after ntldr. (And even boot time defragmenters run way after ntldr).

[hinkley]

Yeah the entire defrag process happens in a blue screen during the boot process.

There was a cheap defrag you could do while NT was running but it can’t move any system files, so after a few system updates you needed a full defrag.