I have protected my application with the following “Hardware Lock” items: CPU + BIOS, but now I want that my new protected application will be locked to CPU + BIOS + HDD. Do I have to obtain again the Hardware ID of my clients?

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I have protected my application with the following “Hardware Lock” items: CPU + BIOS, but now I want that my new protected application will be locked to CPU + BIOS + HDD. Do I have to obtain again the Hardware ID of my clients?

No, you just need to get once the Hardware ID of your clients. After that, you can change the Hardware Lock items with no problems.

Notice that the hardware ID retrieved by WLHardwareGetId is the full hardware ID. WinLicense will just skip from checking the fields that you have unchecked in the Hardware Lock panel.