After that I ran Spybot search and destroy (another program you should have, updated of course),
Not any more LDukey. To be honest, Spybot hasn't worked well for about a year now. Malwarebytes has taken over as the best malware/trojan/spyware product out there. I uninstalled Spybot 6 months ago as it just kept finding the same things all the time - all false positives.
DON'T CLICK ANY OF THE BOXES, NOT EVEN CANCEL OR CLOSE. Drag the boxes off to the side and out of the way
Sadly, most lay-people, my customers, will always click the box - out of panic more than anything else. By then, of course as we know, it is already too late. Like a bunch of guys gatecrashing a party, once the door is held open by one of them the rest pile on in.
I'm surprised to see someone with some I.T. knowledge using Symantec. That POS has been on the top of the virus attack list for years now. Sadly though, even AVG is susceptible. That's why forums such as this one and bleepingcomputers are so great.