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Summary: If your computer is not physically secure, it is very possible for someone to install something unwanted on your machine even when you're not logged in.
The short answer? I think you're right to be concerned. • There are a couple of things about this scenario that bother me, and should probably bother you. "Usually password locked". I'm assuming that by "password locked" you mean either that you are not logged in to the machine, or that a password protected screen saver is running. Either way ... usually? That in and of itself is an open door. If you're away from the machine for any length of time while you are logged in, the door is wide open. But that's not really the worst news. What many people fail to think about is this: If it's not physically secure, then it's not secure. Think about it. Anyone walking by your machine, your "password locked" machine, with a boot floppy or CD-ROM could reboot the machine (by pulling the plug, if needed), boot from their floppy or CD-ROM, and get access to everything on your machine. And that includes installing spyware, reading your data, messing up your files,and whatever else they might think of. So if you have a concern, if your machine is physically located such that untrusted people can have access to it - you are vulnerable. I'd lock the room your computer's in. No, actually, I take that back. I'd get more trustworthy roommates. Related:
Article 469 | Posted October 19, 2004 |
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I have the same worry.
Posted by: Ken Crook at October 21, 2007 2:38 AMWhen I turn on my computer and DSL modem, Windows Update and Norton AntiVirus go out to get updates even before I log onto the internet using IE6 and ATT/Yahoo DSL.
If these programs can go to the internet without my being logged on, can something out there in the World Wide Web download something onto my computer without my knowing it? (I have Windows Firewall running and Norton AntiVirus).