Lag on 1 PC, and only in EQ, any ideas?

[Etaria]

Honest: Got them all uninstalled. Tried safe mode few times, running panda scannerand a few more. Found an AVG uninstaller and was able to reinstall. Ran Malwarebytes. Few things found, and were removed etc. As soon as I got AVG running, things were fine for about a day, then boom, lag back and same as before.


Furniture:
Good PC: Download- 17.94 Mbps; Upload- 7.76 Mbps
Drive Me Batty PC: Download -17.61 Mbps; Upload -5.91 Mbps

Swish:
I will try that patcher. How do I launch with single core? I will try and figure that out [You must be logged in to view images. Log in or Register.] Thank yas!

Edit:
Honest:

Have you tried running the game in windowed mode and fullscreen to see if this still happens? When you say lag do you mean latency issues or just choppy responses? If its latency, download a program that views your incoming/outgoing traffic and see if there is a program or something else that is hogging your bandwidth.

Whoops, missed this. I am not sure what the technical difference between lag and latency is, but it is very very similar to the ddos attacks we are having. So I am not sure what you would characterize that as. I will hit a spell, and the hotbar key will remain depressed. I will cast spells but they do not cast immediately. And when I hit F11, my number shows from 400ms - 1100ms and I go ld eventually or have to ctrl+alt+del out. My good pc shows about 61-68 ms consistently, and regardless of number of people in zone or what is going on those most I have ever seen it at was 71ms.