I appreciate the information and suggestions. I never had the View Point media player, to my knowledge, but the Add-on was in FF, sure enough, though now disabled. I have been having all kinds of trouble, Spyware Doctor and DoubleAntiVirus installing but giving the message that they failed to initialize...well, I won't bore you with it all. I decided that Ravencajun was right, and I needed help from a specialized forum, so I posted on LandsDown, which I think Zep recommended to someone else here. Today, I discovered that something (not me!) had changed the location for my downloads in FF to "Downloads," though I had it set up to download to the desktop. Ulp! Zep: Googling trojan Hiloti was one of the first things I did after Spyware Doctor discovered it in my computer. SD said you had to pay if you wanted to remove the infected files, so I did, but no matter what I did after that, I couldn't even get it to scan again, and the registration number they emailed me, while it sufficed to register for an account at their site, was consistently refused when I tried to register the software. So far, PCTools has not replied to my emails about SD, but perhaps I haven't given them enough time. Very disappointed. The SD icon in the systray also caused TrendMicro Internet Security to hang and the mouse to freeze, so I removed it from startup, but it came back later. So, thumbs down from me to Spyware Doctor. I hope they return my money!

marie- I have four browsers installed on my computer: Internet Explorer, Firefox, Opera, and Chrome. None of them interfere with one another, even when several of them are simultaneously open. I don't know why you are having some of the problems you describe, but you shouldn't be worrying about having to choose between Firefox and Internet Explorer. They are each discrete programs, just like Word or Notepad are discrete programs. Something else is going on here, or you have accidentally made some unintended changes to Internet Explorer, but it should have nothing to do with having two browsers installed.

yes that is a bad one there are many variations of the trogan agent. I would highly recommend you head back to LzD forum and start a new thread there and go through the cleaning process. Tell them the above info. Go update your malwarebytes program and run the full scan with it also and post that log for them.

When I have uninstalled firefox before installing a newer version the bookmarks, history, etc. have stayed in the Mozilla folder. To be double safe you can export your bookmarks (bookmarks > organize bookmarks > import and backup) to a file in your My Documents folder before uninstalling. That way you can delete the folder after uninstalling if you need to do so to install an older version.