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MBR2GPT can not convert? How to solve safely!

MBR2GPT is convenient, but there should be many people who are troubled that they cannot convert due to errors.

It may be due to non-UEFI support, BitLocker encryption, and layout incompatibility.

In such a case, Partition Assistant, easy conversion without erasing the data even for beginners!

Avoid failures and safely convert from MBR to GPT.

# MBR2 GPT Can't convert # Windows 10 # GPT Partition Management

2025/9/28 Edited to

... Read moreMBR2GPTによるMBRからGPTへの変換は、Windows 10の標準ツールとして非常に便利ですが、実際にはエラーが起こりやすいのも事実です。私自身も過去に「ディスクのレイアウト検証に失敗しました」というエラーメッセージに直面した経験があります。この原因は主にUEFI未対応の環境であることや、BitLocker暗号化が施されていること、そしてパーティション構成がMBR2GPTの変換前提条件を満たしていないことに起因していました。 特にBitLocker暗号化については、変換前に必ず暗号を解除しておかないと変換ができず、最悪の場合データ損失のリスクもあるため注意が必要です。また、UEFI非対応のPCでは、MBRからGPTに変えた後に起動ができなくなる可能性があります。ですので、変換前にシステムがUEFIブートに対応しているかどうかの確認も重要です。 私のおすすめの解決方法は、AOMEI Partition Assistantのようなサードパーティーツールを使用することです。このツールはGUIが分かりやすく、初心者でも安心して操作できる点が優れています。実際にデータを消さずに安全に変換でき、Windowsの再インストール不要でスムーズに移行できました。 さらに、変換作業を行う前に必ず重要データのバックアップを取ることも忘れずに実施してください。こうした準備をきちんとすることで、失敗やトラブルを未然に防げるでしょう。 このように、MBR2GPTが変換できないエラーは原因を正しく把握し、適切なツールや手順を踏めば十分に回避・解決可能です。ぜひ安全第一でMBRからGPTへの変換にチャレンジしてみてください。

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