Newly installed Opera browser causing intrusion attempts

Hi,

 

I have been running IE and Firefox in conjunction with Norton 360 on this brand new Windows 8 laptop with no problems.

Recently I downloaded Opera because I wanted to use the built in email function. Since then, every time I open the Opera broswer I receive and advise that an intrusion attempt has been blocked. Below is a screen shot of the alert.

 

I can't find any reference on the Norton support site relating to this issue.

 

Is it safe just to turn off the alerts?

 

Thanks in advance for any feedback

 

John

 

Norton Alert.png