Quote: Originally Posted by inlineskater
I have no virus protection running.
An antivirus program is pretty much the immune system of a computer. By all means consider installing a full-fledged antivirus suite (consisting of an antivirus and firewall feature plus realtime protection), and as an extra layer of protection you can install the free non-realtime version of Malwarebytes on your machine. Windows Defender is not enough by any stretch of the imagination. Since you use Firefox (browse the internet and download stuff, in other words), an antivirus program is all the more important.
Never install two realtime antivirus programs on your computer (should not be possible, because one program will try to remove the other before installing itself, but people find ways to force both onto the machine ;-) ).
You can check this thread for suggestions and opinions on antivirus programs: http://www.sevenforums.com/system-se...nti-virus.html