How to solve a blank after opening the chm file in win7/win8.1 system

  

1, chm files are common in the manual, in the win7/win8.1 system, due to the use of UAC, so that the original chm file originally viewed in xp appears blank and can not be displayed properly.

2. Right click on the property, check [Unlock] and then re-open it, it will display normally.

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