You can start to get more specfic help by posting a HiJackThis log on the Malware Removal forum on this site.
To Download HijackThis go to the following link below:
1. Click on the "Download" button at the top of the page, then click on the "HijackThis Installer" link that will appear.
2. Save HJTInstall.exe to your desktop.
3. Doubleclick on the HJTInstall.exe icon on your desktop. You may get the "open file - security warning" window asking you if you want to run the file. If so, just click "Run".
4. Click "Install". By default it will install HJT to C:\Program Files\Trend Micro\HijackThis and create a HJT icon on your desktop and launch HJT.
5. Click on the "Do a system scan and save a log file" button. It will scan and then save the log to Notepad.
6. Close HJT by clicking on the "X".
7. At the top of the Notepad HJT log screen, hit Edit then Select All then click Edit and then click Copy (doing that copies the text to the clipboard, you won't see it yet....)
8. Come back here to the Malware Removal forum and Paste the log in a new thread. (To paste - if you use IE as your browser - just click on the "Edit" menu selection, and then "Paste" in the drop down menu)
DO NOT have HijackThis fix anything yet. Most of what it finds will be harmless or even required.
A security expert with a gold shield to the right of their screen name should take a look at your log - please be patient. They are skilled and pretty busy folks.