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Q: Please help undo damage done by bad software download

How do I find out what settings a download changed to my MacBook Air?  How do I permanently expunge all related files?

 

I downloaded what I thought was Flip4Mac and it was some piece of junk that polluted my computer; how extensively, I don't know, but I know it's changed my home pages in Chrome and Safari and consistently shuts them down after restarting them.  It also seems to have affected my Mac Mail, too.  I read in another post that there isn't a restore point like there is in Windows, but it wasn't helpful, so I'm hoping theres is still something that I can do?  No, I don't have Time Machine; some message about not having AirPort or something prevents me from going any further with that program.

 

What I've done so far is to erase as completely as I know how from my computer all recent downloads, and associated files (from my Downloads folder), and dumped the trash.  I've reset my home pages in Safari and Chrome, … and that's about it.

 

The "Installer" refuses to be ejected from the side bar in Finder, so I removed it from the side bar, but is it still lurking around in my computer?  When I've tried to eject it, a message appears: The disk "Installer" couldn't be ejected because the Finder is using it.  Stop the Finder action and then try to eject the disk again.

The Finder isn't using it - or shouldn't be…?

 

It's no longer showing in the side bar, but am wondering what else it will do.

 

I'd be grateful for any help.  Thank you.

 

(I apologize if I've posted this in the wrong place).

 

Specs for my MacBook Air:

Software Mac OS X Lion 10.7.5

Processor 1.8 GHz Intel Core i7

Memory 4GB 1333 MHz

MacBook Air, Mac OS X (10.7.5)

Posted on Aug 7, 2014 11:57 AM