First make sure that you have the latest version of HijackThis click here
Save Hijack this in its own folder. Run it and click the Scan button. Click Save Log (do NOT try fixing anything). Save the log in the same folder as HijackThis.
The log will open in Notepad. Copy it from there and paste here. You may need to do this in two or more sections because of the 800 word limit on this site. Also, please double-space it by adding a blank line every other line.
Then, please be patient. Hopefully Nellie2 will be along in a while but she is one of the busiest people on the net.
In the meantime, please ignore any well-intentioned suggestions to run this, that or the other. That would not be helpful until your log has been analysed by an expert.