Ried

Reboot into Safe Mode.

Delete the following files:

C:\WINDOWS\kl.exe
C:\WINDOWS\secure32.html

C:\Program Files\Yahoo!\YPSR\Quarantine <--Empty the contents of this folder

Follow the instructions outlined here to clear Sun Java's cache.

Reboot into Normal Mode.

Please download Trend Micro™ Anti-Spyware for the Web Utility (by clicking the "Scan and Clean your PC" button).

*Save it to your desktop.
*Double-click the new icon on your desktop (tmas-web-scan.exe)
*It will say "Loading TrendMicro definitions".
*Once the definitions are loaded, the program will appear to close then re-open.
*Click "Start Scan"
*After it's done scanning, click "Scan Results"
*Make sure all items found have a check next to them, then click "Clean Threats Now".

Click Exit.

Reboot your computer. In place of the TrendMicro icon will be a text file called "Antispyware.log", please double-click that log and copy the entire contents and paste them in your next post along with a new HijackThis log.