# Windows

> Windows 11 26H2, 25H2, LTSC and ARM64 by task: install, measure, develop, troubleshoot.

Pick the version, install it cleanly, measure before you tweak, and keep a way back. Every guide names the build it applies to.

8 guides · Windows 11 26H2 / LTSC 2024 / Arm64 · E1 documentation + E2 lab

Before you start

Get the media from the vendor

Official ISO, Enterprise evaluation and USB writer links, checked and hash-verified — no mirrors, no “pre-activated” images.

[Downloads Windows 11 & 10 ISOs x64 and Arm64 images, Media Creation Tool, Installation Assistant, Insider builds. →](https://winbook.fyi/en/downloads/windows/)
[Downloads All downloads Windows, Windows Server, admin tools and lab utilities in one verified catalogue. →](https://winbook.fyi/en/downloads/)

Choose the job

What are you doing today?

Start with the task, not the chapter. The type label tells you whether this is a decision, a checklist, a setup or a measured tweak.

[Concept Choose the build 26H2, 25H2, LTSC 2024 or Arm64: support window, hardware and the trade-off. →](https://winbook.fyi/en/windows/start/versions/)
[Task Clean install 26H2 Official media, UEFI, TPM 2.0, partitions and the post-install checks. →](https://winbook.fyi/en/windows/install/clean/)
[Checklist Set up a new PC Updates, drivers, browser, privacy and backup before the toolchain. →](https://winbook.fyi/en/windows/start/first-hour/)
[Setup WSL2 on a Dev Drive Ubuntu on D: with the ReFS limits stated up front, not hidden. →](https://winbook.fyi/en/windows/dev/wsl2/)
[Method Measure a game Frame time and 1% low before any tweak; one change at a time. →](https://winbook.fyi/en/windows/gaming/measure/)
[Measured tweak Memory integrity / VBS HVCI on/off, three runs each; the CPU delta was inside the noise. →](https://winbook.fyi/en/windows/gaming/memory-integrity/)
[Troubleshoot Fix DLL & 0xc000007b Find the runtime, check bitness, repair the store — never download a random DLL. →](https://winbook.fyi/en/windows/fixes/dll-runtime/)
[Platform Windows on Arm Arm64 native vs Prism, the 26H1/26H2 split and driver blockers. →](https://winbook.fyi/en/windows/platform/arm64/)

If you are new

Version → install → first boot

Do not start with a tweak. Three pages get a supported PC, then you can choose a task above.

01

Choose

Match the edition and support window to the hardware.
[Compare versions →](https://winbook.fyi/en/windows/start/versions/)

02

Install

Official media, UEFI, TPM 2.0 and a partition layout you can explain.
[Clean install →](https://winbook.fyi/en/windows/install/clean/)

03

Verify

Read the build, firmware and TPM state in the guest.
[First 10 minutes →](https://winbook.fyi/en/windows/start/first-hour/)

04

Go deeper

Develop, measure or troubleshoot with the build-specific guide.
[Back to the task list →](https://winbook.fyi/en/windows/)

01
Build-specific

26H2 means 26300; every page says which build and edition it covers.

02
Evidence first

E1 is documentation, E2 is a reproduced lab, E3 is physical hardware.

03
Rollback included

A snapshot, restore point or reverse command. No page hides the way back.

---

Source: https://winbook.fyi/en/windows/