OK. Run HiJackThis and Do a system scan then follow the directions below.
Remember to close all browsers and windows when using HJT. In your HJT log please have HJT fix the following items by placing a check/x next to its name then clicking Fix Checked:
O2 - BHO: SDWin32 Class - {7EB20A25-F0A7-4BCF-BE7F-39FE84633F67} - C:\WINDOWS\System32\izhfh.dll
O2 - BHO: SDWin32 Class - {C30CF9C1-BA52-4E13-8525-9B1B7B25EA02} - C:\WINDOWS\System32\zlgbu.dll
O4 - HKLM\..\Run: [websx] C:\Program Files\websx\int302531.exe -auto
O4 - HKLM\..\Run: [VidiaDrivers] C:\Program Files\Windows Media Player\wmplayer.exe
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O23 - Service: htagyaa - Unknown owner - C:\WINDOWS\system32\htagyaa.exe
O23 - Service: MMtask Engine (MMtaskEngine) - Unknown owner - C:\WINDOWS\System32\mmtask.exe (file missing)
Useing Explorer you need to delete the following folder.
C:\Program Files\websx\
Let the system reboot.
Post back a fresh HijackThis log and we will take another look. And let me know how your system is running.