Looks like your hard work has paid off, the GMER scan is showing that your infected with the latest version of the TDSS Rootkit. This is whats causing you all your grief.
You have Combofix on your desktop, drag it to the trash and download a fresh copy to your desktop < Important But don't run it yet
Download Combofix from any of the links below. You must rename it before saving it. Save it to your desktop.
* IMPORTANT !!! Save ComboFix.exe to your Desktop
It would be to your benefit to install the Recovery Console in case its needed
Next, do this
Open Notepad Go to Start> All Programs> Assessories> Notepad ( this will only work with Notepad )and copy all the text inside the Codebox by highlighting it all and pressing CTRL C on your keyboard, then paste it into Notepad, make sure there is no space before and above TDL::
Save this as CFScript to your desktop.
Then drag the CFScript into ComboFix.exe as you see in the screenshot below.
This will start ComboFix again. After reboot, (in case it asks to reboot), post the contents of Combofix.txt in your next reply together with a new HijackThis log.