Please download
[Only Registered and Activated Users Can See Links. Click Here To Register...] to your desktop.
Double-click VundoFix.exe to run it.
Click the Scan for Vundo button.
Once it's done scanning, click the Remove Vundo button.
You will receive a prompt asking if you want to remove the files, click YES
Once you click yes, your desktop will go blank as it starts removing Vundo.
When completed, it will prompt that it will shutdown your computer, click OK.
Turn your computer back on.
Please post the contents of C:\vundofix.txt and a new HiJackThis log.
Post the two logs above and let me know how the computer is running now. We may have more to do.