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Vocational examination treasure Dian education
This depends on which one you bought. Generally speaking, the computer will not be shut down after being registered and reinstalled, as long as you remember the registration information at that time. The seller's reminder when buying:

A registration code can only register one subject (module) on one computer. If you don't plan to register on this computer, don't test on this computer. You can't use it on other computers after registration. Please keep the registration code yourself, and use it again when reinstalling the system or upgrading the question bank. This registration code shall not be reissued for any reason, and must be purchased again after it is lost.

You must be familiar with it to ensure high marks, especially the questions in hand. Before making a mock examination room, you should be familiar with the questions in your hand.

I bought it and put it on the computer. This is the icon: