Hello I'm new here; I was sent here from mozillazine.org where I posted this:
My problem is as follows: I used adwcleaner and it listed pref.js and, since the latest adware update, a key called HKCU\Software\AppDataLow\Software.
Each time I delete this via adwarecleaner it reappears the next time I use Firefox.
Now, everytime I uninstall Firefox, Adwarecleaner doesn't show anything anymore.
BUT under AppData/Roaming I find this "nsu.tmp" folder and it contains bu_.exe and au_.exe.
They are called "FirefoxHelpers" and sometimes I can delete the files but not the empty folder.
My computer expert said this could be a sign of the programme trying to copy itself somewhere else, but he didn't know whether these exe were dangerous or not, or if this was just the rest of some adware. An external virus scan didn't show anything, but he said it could be a programme that downloaded data everytime I use the internet and therefore can't be detected.
What are these exe files and can I safely reinstall Firefox.
And I got this reply:
A very quick Google resulted in the fact that you may have a real nasty on board.
I suggest the you go to the "Bleeping Computer" site, register & post all the details there.
Thanks in advance!