Bootloader installer 2.0 (C++ port)

README.md

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+# Change BootLoader — C++ port
+
+Native Win32 port of `Change_bootloader\Change_bootloader.au3` with the same
+window, buttons, actions and messages.
+
+## Build
+
+Requirements: Visual Studio 2022 (Desktop C++) and CMake 3.20+.
+
+```bat
+build.cmd
+```
+
+Output:
+
+```
+build\Release\Change_BootLoader.exe
+```
+
+The executable is 32-bit, uses a static CRT (no VC++ redistributable), and
+requests administrator rights through the embedded manifest.
+
+## How it works
+
+- The program must be started from the root of a PARAVIS flash drive, for
+  example `F:\Change_BootLoader.exe`.
+- It derives the drive from its own path and checks for
+  `\efi\Paravis\Boot\bootice.exe` and `\efi\Paravis\Boot\NOT.DEL`.
+- If those files are missing, it shows the original error and exits.
+- Seven buttons perform the same operations as the AutoIt version:
+  - Legacy BIOS: XorBoot, Bootmgr, Grub4Dos, Grub2
+  - UEFI: Bootmgr, Grub2, Xorboot
+- Bootice, xcopy and the GRUB2 MBR helper script are invoked exactly like
+  the AutoIt version. The helper script is
+  `\efi\Paravis\Boot\grub2\bios\make-paravis-mbr.ps1`.
+
+## Notes
+
+- The UI matches the AutoIt version (376 × 208, same fonts, positions,
+  hover/pressed colors).
+- Message boxes are native `MessageBoxW` dialogs with the same titles and
+  texts.
+- The debug log is disabled by default. Set `PARAVIS_DEBUG_LOG=1` to write
+  `%TEMP%\cbl_cpp_debug.log`.
+- The GRUB2 Legacy action uses the same bootice `/sectors` commands as the
+  AutoIt version. On some virtual disks bootice displays its own sector
+  confirmation/error dialogs; on a real PARAVIS USB flash it behaves the
+  same as the original.
+
+## Repository layout
+
+```
+src/            C++ sources and resources
+legacy-au3/     original AutoIt script
+build.cmd       release build
+```
+
+## License
+
+MIT. See [`LICENSE`](LICENSE).
+
+This repository contains source code only. Third-party binaries used at
+runtime (`bootice.exe`, `xcopy`, `powershell.exe`) are not distributed here
+and must be supplied by the system or by the PARAVIS flash image.