Something is causing this to be recreated but it's not showing in your HJT log (or if it is, I'm overlooking it). I'd like to suggest another program for you to try, I've found it can find things most other programs can't.
It's called CounterSpy and you can get it from here:
http://www.download.com/3000-8022_4-10337358.html
It has a 15-day free trial which will be plenty of time to get your system cleaned up, or you can purchase it for $20 (US). After you download it, install it; when asked for a registration number, just click next.
Before scanning the first time, make the following adjustments to the settings:
CounterSpy Settings
At the very top, click on File, and then Check for updates
When it’s finished updating, click the ‘Close’ button
Under ‘Spyware Scan’ on the left, click on ‘Run a spyware scan’
In the left pane, click on ‘Scan Options’
Mark ‘Full system scan’
Check all boxes under ‘Full system scan,’ including ‘Save these options’
In the right pane, near the bottom, click ‘Manage Schedule’
On the left side, select your preferred schedule options
On the right side, under ‘Scheduled Scan Options,’ check:
‘Always run a deep scan’
‘Automatically remove spyware cookies’
Click the ‘Update Schedule’ button
At the top, click on ‘System Tools’
Double-click on ‘History Cleaner’
Check the following options (if they are not grayed-out):
‘Internet Explorer History’
‘Internet Explorer Cookies’
‘Kazaa’
‘Temporary Internet Files’
Review the list for any other ‘History’ items you wish to clean
At the bottom, click ‘Remember checked’
Click on the ‘Clean History’ button
Click the ‘Yes’ button, and then the ‘OK’ button
Click ‘Back’ at the top
Double-click ‘My PC Checkup’
Click the ‘Start’ button
In the first part of the list, uncheck everything up to any ActiveX entries; the entries you uncheck can be checked later, individually, to ensure they won’t interfere with your browsing habits (for maximum protection, however, you may leave them all checked)
Leave all ActiveX entries checked
In the second part of the list ‘(Items already changed below…),’ leave all entries checked
Click the ‘Continue’ button
Click the ‘OK’ button
At the top, click ‘Spyware Scan’
On the right side, click the ‘Scan Now’ button
This will take awhile depending on the size of your drive(s), number of files, CPU, etc. (40 minutes on my computer)
When the scan is complete, use the drop-down arrow next to each entry and select ‘Remove’ (if you see any entries that you think you may wish to keep, ‘Ignore’ them for now and post them for recommendations)
Select ‘Create restore point’ if you want CounterSpy to create a Windows XP System Restore point
At the bottom, click ‘Take Action’
Click the ‘Close’ button and exit the program
Now, reboot, close all browser windows, scan with HJT, post a new log, and let us know if the problem still exists.