Grub4Dos Installer 1.1 (also known as grubinst_gui.exe a legacy Windows-based utility used to install the
Last tip: Before running Grub4DOS Installer 1.1 on a critical machine, test it inside a virtual machine (VirtualBox with legacy BIOS enabled). Clone your target USB’s MBR using dd if=/dev/sdX of=backup_mbr.bin bs=512 count=1 on Linux. grub4dos installer 1.1
Select the Target Disk
From the “Disk” dropdown, pick your USB drive. Double-check the drive size to avoid selecting your system drive. Grub4Dos Installer 1
Step 2: Run as Administrator
Right-click the .exe and select Run as Administrator. The installer requires raw disk access. Double-check the drive size to avoid selecting your
Versatility: Capable of dual or multi-booting DOS, Windows, and Linux.
| Feature | Grub4DOS 1.1 | GRUB2 | rEFInd |
| :--- | :--- | :--- | :--- |
| UEFI Support | ❌ No | ✅ Yes | ✅ Native |
| Boot ISO from NTFS | ✅ Yes | ⚠️ Requires modules | ❌ Limited |
| RAM Disk Loading | ✅ Native --mem | ❌ Cumbersome | ❌ No |
| File Size | ~450 KB | ~2 MB+ | ~4 MB+ |
| Ease of Menu Editing | Trivial (plain text) | Moderate (complex syntax) | Easy (manual stanzas) |
Ventoy: Highly recommended for its "copy and boot" simplicity and extensive ISO support.