Data Recovery Information -> Partition Manager FAQ -> Question
Q: MiniTool Partition Wizard asks me to restart my computer. After computer restart, MiniTool Partition Wizard says that the disk configuration is changed, and the process can not be continued. And all the operations are not applied. Why?
a) For this problem, you should first disconnect all USB disk, then launch MiniTool Partition Wizard.
b) If your operation target is a USB disk, you need to disconnect this USB disk, then restart computer, and connect the USB disk before launch MiniTool Partition Wizard.

From http://www.partitionwizard.com.
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