What most likely went wrong was an infected file you downloaded from Limewire.
The good news is that here at Bleeping Computer we have experts who can guide you through the process of cleaning your system.
When you post your Hijact This log, either link back to this post or repeat the info you gave here.
Read the information HERE:Preparation Guide For Use Before Posting A Hijackthis Loghttp://www.bleepingcomputer.com/forums/t/34773/preparation-guide-for-use-before-using-malware-removal-tools-and-requesting-help/
Prior to posting a HJT log, we ask that you please read and
follow all instructions in the pinned topic titled Preparation Guide For Use Before Posting A Hijackthis Log
Following the steps in this Guide will allow the HJT Team
to quickly help you with specific fixes for what may
remain on your system.
Please complete all the steps in the Guide.
If you have performed some of them already, then
just continue with the next. If you can't perform a step,
then skip it and continue with the next. The last step will
include downloading and using the most current version of
HijackThis if the first line of your log does not appear as follows:
Logfile of Trend Micro HijackThis v2.0.2
Please note that it is important that HijackThis be run and a log created while in normal mode. If you run it and create your log while in safe mode, you will be asked to redo it again properly. When you have completed those steps, start a new topic in the HijackThis Logs and Malware Removal forum as directed in the Guide to post a new log.
The log should be posted in HijackThis Logs and Malware Removalhttp://www.bleepingcomputer.com/forums/f/22/virus-trojan-spyware-and-malware-removal-logs/Please DO NOT post your log to this topic, or post a log in the wrong forum
Once that is done, a Member of the HJT Team will analyze your log and assist you with step by step instructions to clean your computer or otherwise advise what needs to be done.
Please be patient while you wait for a reply, the malware removal team is very busy and they will get to your log as soon as possible.
Thanks for your cooperation and good luck.
The BC Staff