Can I Convert Windows 7 Boot Disk from MBR to GPT?

I want to use my old laptop Win7 Pro which was installed with my MBR partition. I want to use this on my new laptop that only supports UEFI boot. I want to get the old Win7 disk to boot on the new laptop since I plan to add an M2 SSD. I'm hoping somebody out there has done this and could help me.

Yes, you can convert Windows 7 boot disk from MBR to GPT. Windows has two built-in tools - Disk Management and the Diskpart of Command Prompt, which can help you convert the partition style between MBR and GPT. However, this former will delete all your reserved partitions, while the latter will wipe all the data on the MBR disk before converting. This article will give you an effective way to convert MBR to GPT without a fresh install of Windows 7.

Designed to help the user better manage their partitions, EaseUS Partition Master perfectly hit the spot of converting MBR disk to GPT disk. More importantly, you don't need to delete partitions using this tool, which means no data loss during conversion. 

Follow the guide below to use EaseUS Partition Master:

According to your description, you plan to clone the system disk to a new M.2 SSD after the disk conversion. EaseUS Partition Master can also help you clone the disk to SSD so that you can use Windows 7 on your new laptop. 

Here are the detailed steps:

• Select "Disk Clone" from the left menu. Click "Clone OS Disk" and "Next."
• Choose the GPT disk and click "Next."
• Select your SSD and click "Next. " (Restart the computer after you install and fasten your new SSD. )
• Click "Start" and wait for the clone process to complete.

With this powerful tool, you can also convert GPT to MBR with simple clicks.

Further Reading: Guide on Convert GPT to MBR