Reboot into safe mode following the instructions here & Close all (browser) windows & rescan with hijackthis. When the scan is finished place a check in the box to the left of the following entries & click 'fix checked':

O4 - HKLM\..\Run: [SysA] C:\winnt\system32\winfoi32.exe
O4 - HKCU\..\Run: [Eoeu] C:\Documents and Settings\Dennis\Application Data\iehl.exe

O16 - DPF: {9EB320CE-BE1D-4304-A081-4B4665414BEF} (MediaTicketsInstaller Control) - file://c:\x.cab
-MediaTickets Installer

O18 - Protocol: icoo - {4A8DADD4-5A25-4D41-8599-CB7458766220} - C:\WINNT\msopt.dll

Find & delete:

C:\winnt\system32\winfoi32.exe
C:\Documents and Settings\Dennis\Application Data\iehl.exe
C:\WINNT\msopt.dll

In order to view these files you may have to select 'show hidden files/folders.' Instructions on how to here.

Reboot normally after doing the above then post a fresh log please.

It may take me a few days to reply as I am going away for the weekend. It looks like the hijacker is gone though .