Win8.1 installation software prompts that the registered key set is invalid and cannot be installed

  
                                    

I tried installing a few software, including the Bing Dictionary and the Diablo Big Box plugin, and other software like the 115 network disk would not. How to solve this problem?

This may be caused by a serious problem with the system components. It is best to perform the operation of “Recovering the computer without affecting the file” operation, and restore the system with minimal impact. To solve the problem.

The method is as follows:

1. Move the mouse to the lower right corner of the screen, call up the Charm column, and click the gear shape to set the ” button.

2.Click “Change Computer Settings&

3.Click “Update & Restore" 

4.Click “Restore”

5. Click “Start” in the corresponding location according to your needs.

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