I booted my machine this morning to find Norton reporting that I had the Hacktool.Rootkit trojan. It reported that it had delted the file successfully and I rebooted without any problem. A subsequent Full system scan didn't detect any further infections, and I reboted again without any problem. I'm currently running another full system scan just to be sure :)
My main question is how could I have contracted this virus? I run XPsp2 and Norton Internet Security & keep it up to date. I run a scan weekly. I have both Norton's firewall and my router's firewall running. I haven't downloaded and installed any new software recently (as in not for 6 months) and generally only use download.com if I do. I'm cautious about running any email attachments unless I've scanned them myself (and I haven't done this for months on this machine anyway). Given all this I'm concerned that I still managed to get this nasty virus and if possible I'd like to know how I got it so I can avoid making the same mistake twice! I've tried searching these forums and google but couldn't find any information about how this particular virus spreads.
I've not detected any unusual activity on this computer, but would also like to know, if possible, how worried I need to be about any security breach and whether Norton will have properly removed it.
Thanks for your help.