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Has anyone come across this.

It has replaced my browser(s) Google startup page.

I was able to find out that it's a Windows malware, and that it could get malicious

I did do a scan with a demo from MacKeeper and full version VirusBarrier but neither found anything

I've been a Mac user for over twenty years and this is a first for me so no I've no idea how to get rid of it.

 

Thanks for your reply

D-link has been banned from our network for years now.

Everything else related to our router checks out

I suspect one of the kids went into a web area without taking precautions, since two of the computers are infected. I've disabled file sharing to hopefully protect the third.

 

For those who care:

Firefox troubleshooter fixed both itself and Safari