How to remove the disk protection without protection record?

If you have lost the disk protection record, you have to remove the protection manually.

Right click on Computer, select Manage in the pop-up menu, and then Computer Management window appears. Click Disk Management in the left list, right click on the disk without drive detter, choose "Change Drive Letter and Paths...", and then add a drive letter to the disk in the pop-up dialogue box.

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