Download HijackThis from here & unzip it into it's own, permanent folder, (not a temporary folder & not on the desktop). Start HJT & press the scan button. When the scan is finished the scan button will change to save. Save the log to a text file, copy the entire contents of the text file & paste it into the body of your post. DO NOT FIX ANYTHING YET. Most of what is there is harmless & even necessary to the running of your system.