Operating systems, infrastructure, emulation, and technical history.
Why Microsoft's April 8, 2014 cutoff for Windows XP updates became one of the most consequential OS end-of-life dates, given how many machines still ran it.
Released to retail October 25, 2001, Windows XP was the first consumer edition built on the NT kernel, ending the split between the 9x and NT lines for good.
Why Windows services stopped interacting with the desktop starting with Vista, and what changed in the session architecture to cause that.
The coordination mechanism that lets Windows back up files that are open and being written to, without the inconsistency a live copy would risk.
Each WSL2 distro lives inside a dynamically-expanding .vhdx file that grows with use but never shrinks back down automatically after deletions.
WSL distros reduce to a root filesystem tarball plus small registration metadata, which is exactly what makes import, export, and custom distros work.
Working through the specific, common causes of post-update WSL permission errors instead of reflexively reaching for chmod 777 or broad workarounds.
Why WSL2's internal VM clock falls behind Windows after sleep or hibernation, and the specific steps to force it back into sync reliably.
Working through Windows features, firmware virtualization, kernel version, and disk space in order to find why a WSL distro hangs or refuses to start.
Working through Docker Desktop's specific WSL2 integration points, from backend mode to per-distro toggles, when containers fail with confusing errors.