Some software only works when the system disk uses the GPT (GUID Partition Table) layout. If the disk is MBR, the program may not start. Below is how to check in Windows.

Method 1: Disk Management

  1. Press Win + X, select Disk Management (or Win + R → diskmgmt.msc → Enter).
  2. In the disk list at the bottom, find Disk 0 (usually the system disk). Right-click it and choose Properties.
  3. Open the Volumes tab. Under “Disk information”, find Partition style. It will show GUID Partition Table (GPT) or Master Boot Record (MBR).

If it says GPT, the format is suitable. If MBR, converting to GPT usually requires a conversion tool (e.g. mbr2gpt) or reinstalling Windows; back up your data first.

Method 2: PowerShell

  1. Press Win + X, choose Terminal or Windows PowerShell (run as Administrator for full disk list).
  2. Run: Get-Disk | Format-Table Number, FriendlyName, PartitionStyle -AutoSize
  3. In the PartitionStyle column for the system disk you will see GPT or MBR.