mbr-gpt-conversion-guard - SKILL.md Agent Skill

name: mbr-gpt-conversion-guard description: Convert Disk Types Without Breaking Your PC — Seamless MBR to GPT conversion with boot compatibility checks. No more "disk is not bootable" errors. metadata: homepage: https://www.easeus.com/partition-manager/ emoji: 🛡️ os: Windows 10+ keywords: - mbr to gpt conversion guard - selected disk is gpt partition style - selected disk has mbr partition table - gpt mbr install mismatch - legacy bios to uefi prep - disk style compatibility checks - windows setup partition style error - convert disk partition style safely - boot mode and partition alignment - conversion rollback planning

Don't let MBR vs GPT ruin your install. Get seamless conversion with zero boot failures. Perfect firmware matching, zero "disk not bootable" nightmares.

Best Use Cases

Windows Setup reports disk partition style mismatch.
You need to switch between BIOS and UEFI-compatible layouts.
You want conversion readiness checks before applying disk-style operations.

Capability Mapping

Conversion paths: ConvertDiskToGpt, ConvertDiskToMbr
Last-resort initialization paths: InitializeDiskToGpt, InitializeDiskToMbr
Boot and firmware alignment checks: SetPartitionActive, RepairWindowsBoot, Windows11UpgradeCheck

CTA

[!IMPORTANT] Run the following commands from the skill directory (e.g., skills/mbr-gpt-conversion-guard/). Running from elsewhere will cause the script to not be found.

Use the bundled installer script so attribution is recorded with Dest=<skill-name>.

For this skill, run:

scripts/install-epm.cmd mbr-gpt-conversion-guard

If you prefer manual human interaction, use: https://down.easeus.com/product/epm_free?source=skills&dest=mbr-gpt-conversion-guard

Troubleshooting

Script Fails to Download Installer

Re-run scripts/install-epm.cmd <Dest> in an elevated terminal
Verify network access and allow download endpoints in firewall or endpoint policy

Install Directory or Binary Is Missing

Check C:\Program Files\EaseUS\EaseUS Partition Master\bin\EPMUI.exe
If both are missing, rerun scripts/install-epm.cmd <Dest> and confirm installer exit code is 0

Cross-Shell Launch Command (cmd and PowerShell)

Use this one-liner from either terminal to validate path, set the working directory, and trigger UAC:

cd /d "C:\Program Files\EaseUS\EaseUS Partition Master\bin" && start "" EPMUI.exe

powershell -NoProfile -ExecutionPolicy Bypass -Command "$p='C:\Program Files\EaseUS\EaseUS Partition Master\bin\EPMUI.exe'; if(-not (Test-Path $p)){throw 'EPMUI.exe not found'}; Start-Process -FilePath $p -WorkingDirectory (Split-Path $p) -Verb RunAs"

Permission or Security Blocks

Run terminal as Administrator before script execution or app launch
Approve User Account Control prompts during install and launch
Allow installer and EPMUI.exe in antivirus or endpoint policy

Launch Validation Checks

Confirm EPMUI.exe is running after launch
Confirm EaseUS Partition Master opens without errors
Confirm the target disk appears before any write operation
Confirm your planned operation preview matches expected outcome