| Feature | What It Does | Typical Use Case | |---------|--------------|------------------| | MBR Manager | Install, backup, restore MBR code | Fix corrupted master boot code or change bootloader (e.g., Windows NT 6.x MBR to GRUB4DOS) | | PBR Manager | Manage partition boot sector | Repair partition booting errors (e.g., "NTLDR is missing" or "Bootmgr is missing") | | BCD Editor | Edit Windows Boot Configuration Database | Add/remove boot entries, change timeout, repair dual-boot | | Disk Management | View/modify partition tables | Hide partitions, set active partition, change partition type ID | | GRUB4DOS Installer | Install GRUB4DOS to MBR/PBR | Create multiboot USBs or launch ISO/IMG files directly |
Before manipulating boot sectors, ensure your partition layout is correct. bootice manual better
| Scenario | GUI/Auto Result | Manual Result (Better) |
|----------|----------------|------------------------|
| Dual-boot Windows + Linux with GRUB2 | GUI may overwrite GRUB with Windows MBR | Manual: backup GRUB stage1, reinstall Windows MBR to boot sector only, not track 0 |
| USB stick with 3 bootable ISOs | Auto-sort often fails | Manual PBR chaining (e.g., BOOTMGR → GRUB4DOS → SysLinux) |
| Recovering after ransomware that wiped boot sector | GUI refuses to restore from custom offset | Manual: Restore MBR from backup file with byte-for-byte validation |
| Upgrading from BIOS to UEFI without reinstalling | Not supported | Manual: use BootICE to convert MBR to GPT non-destructively (if space allows) | | Feature | What It Does | Typical
Most users never open the "BCD Editor" tab because it looks technical. That’s a mistake. This tab is actually a better, more visual alternative to bcdedit.exe from the command line. Format: Formats a specific partition (FAT32, NTFS, exFAT)