Ahoy everyone, I'm new here and I hope I'm posting this in the correct forum. I'm not sure how this happened, but after being out of town for a few days when my little brother was here, I come home to this annoying little pop up bubble. I'm sure most of you know it, as it's a red circle with a white "X" that tells me that my system's infected. I have Ad-Aware 07 Plus and after running it, the thing still won't go away. I can't open HijackThis at all, when I double click to start it or any other way, nothing happens after that. I've noticed that theres a program called "CyberLink PowerDVD" installed as well now. Is this the cause for it, or is there something else? Any help would be greatly appreciated.

Edit: Oh, I forgot that the pop up bubble tells me that if I click it, it'll take me to download the most up to date antivirus programs or whatever.