Why Norton Internet Security Antivirus blocks SkyPrivate plugin? and what is WS.Reputation.1 alert from Norton?

WS.Reputation.1 is the default alert type set by the antivirus company Norton for the software applications that are new or do not have many reviews from the Norton Security community users. 
SkyPrivate plugin for windows is SAFEYou can scan it with other antivirus software to trust it.

If you get this alert:

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or this alert:



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You should do like this:

1. Download again the plugin
2. Right-click the setup.exe file > choose 
"Norton Internet Security" > choose "Norton File Insight"
3. Then click "
Trust now" link.
(see pictures bellow)



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Click "Trust now":

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4. Now double-click the setup.exe to start installing the plugin.