Unzip HJT into it's own permanent folder before doing anything in order for it to create backups. (Not a temporary folder or the desktop & not directly on your hard drive). 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' :
O1 - Hosts file is located at: C:\WINDOWS\System32\drivers\etc\hosts
O4 - HKLM\..\Run: [RunDLL] rundll32.exe "C:\WINDOWS\System32\bridge.dll",Load
Launch Notepad, and copy/paste the bold below into a new text file. Save it as URLRepair.reg (Change the 'Save As Type' to 'All Files'). Save it in C:\
REGEDIT4
[-HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\URLSearchHooks]
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\URLSearchHooks]
"{CFBFAE00-17A6-11D0-99CB-00C04FD64497}"=""
Locate it (in C:\) and double-click on it (launch it). You'll recieve a prompt similar to: "Do you wish to merge the information into the registry?". Answer yes and wait for a message to appear similar to "Merged Successfully".