First, congrats on the updated machines! I'm sure you're enjoying the new speed and stability!
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If I have a trojan, how do I identify and get rid of it?
First, realize that a "trojan" in and of itself, is not a problem. It's what the trojan carries inside that does the damage. But you must first 'accept' the 'gift' the trojan offers, in other words, assume that the message, that is absolutely always asking you to do something, is honest and proper. You usually still have one more warning to "Stop, Look & Listen" before the "train wreck" happens: you will be asked to enter your password. Don't even do that out of habit. Know why that action is needed!
So, to get rid of the trojan, just delete the file/message/app that delivered it. Period. That's what "trash" is for; getting rid of foul-smelling, bug-infested, contagious junk!
If you don't think you know how the trojan was introduced, just wait a few days and someone will usually announce exactly where to look and there may even be an app whose sole purpose is to delete the thing, from its nose to its tail!
Many of us have been brain-washed into thinking we must install everything as soon as possible. Don't fall for that trap. Nor is it wise to respond to every email just because it appears to come from a friend. Any good email app will show you the actual URL of a link simply by hovering your cursor over the link. If it looks strange, it probably is! If the message sounds too good to be true (or just extremely interesting) it probably isn't (and the "interesting" part may end up being restoring your files and drives!
).
If anything comes along hat can't be handled by ClamXav, you'll hear about it pretty fast. Of course, visiting TS daily is, in my opinion, an excellent way to stay informed...
But beware of Geeks bearing gifts!