Looks like you have the
Troj/Inor-A trojan
Fix the following entries in HijackThis, making sure that Internet Explorer is closed, then reboot and save and new log and post that to this thread.
C:\WINDOWS\LLASS.EXE
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page =
http://www.searchalot.com
O4 - HKLM\..\Run: [lar] C:\WINDOWS\LLASS.EXE
Also follow the instructions in the sophos.com page linked above about the trojan - there are a couple of registry entries that you may need to remove manually to completely rid yourself of this trojan, but do heed the warnings about backing up the registry.