I'm suspecting a virus F-secure can't find?
Let me begin with why I suspect I am having a virus on my Macbook. It has to do with Safari suddenly shutting down and directly after Apple asks me for admin and password. I do not provide it, I shut it down and have to do so 3 times before it closes. In most cases I would not be suspicious about this - yet there is some concern and I'll describe it now.
About 3 weeks ago I was in a hurry to upload something through ftp. But the trial time of my ftp program had expired and I didn't want to pay for a program I use 2 times per year. So I did a quick search on google and found a random program that I downloaded. I installed it a bit premature. As it was installing I realized that I was installing a bunch of other programs as well and I hit the panic button, killed the wifi and forced the installation to shut down. Meanwhile, I realized it was too late. A Safari window opens up - that was not Safari. It only looks like Safari. I shut it down and it opened up again.
I use F-Secure, and it immediately flagged that something was off. I did a full scan and it found some harmful code. I also found plugins in Safari and Chrome that was not there before, so I deleted them. Since then I've conducted a few more scans and F secure does not find anything new.
But now I suffer from Safari suddenly shutting down a few times per day. Immediately there is a window that asks for admin password from apple. I do not trust this.
The other day I also observed something strange. I was working on something when Safari suddenly switched to a different window by itself before it shut down. Directly after it was shut down it opened up again. I saw in the menu that bookmarks flashed 3 times as if the mouse was trying to click on it, but the menu did not open. Safari shuts down again. When I opened it I did a google search and got search results from Yahoo. Usually, I get google. So I went into the plugins again, and yes there was a new plugin that I deactivated and removed. Did a new scan but F-secure did not find anything new.
So I am suspecting there is something in my laptop that is harmful. Has anyone had this issue before?