Again I'm sorry for the lack of details in this post. I'm not positive that I'm infected with something but I wanted to get some confirmation from the pros.
After first starting up my computer runs perfect, in fact it is running great right now. But a couple days ago I noticed that if I lock my computer and leave it for a few hours things start screwing up. After locking it last night around 4PM I came in this morning at 7AM and tried to ctrl-alt-del to unlock it and it wouldn't respond, it just flickered at the unlock screen. Nothing else worked so I had to kill the power. After booting up it has been running perfect all day.
Sometimes I can unlock it just fine but when I move my mouse over the taskbar/quick launch icons they start disappearing and never come back. I can click on them to open my applications but they do not display anything. The computer also runs slow at that time. But again this is only after letting it sit over night in the locked state.
It may or may not be an infection, please take a look and let me know what you see.
I have attached my GMER and HJT logs.
DDS just opens notepad and displays gibberish, never displays the CMD as the instructions state will happen.
Malwarebytes turns up no infections at all, not even back cookies.
The computer is XP Pro SP3.