I’d almost put money on it being AV. But I’d also think the installer wouldn’t just crash on locked file. That was my first thought too though since I don’t believe the qbt executable is signed.

I purchased 3/5 books of the series. The 2 free books add up to 13 hours.

There are 3 leaks in circulation:

4.3 gigs, src only

17 gigs, src + partial assets

1 TB, src + full assets