Once downloaded, follow these instructions to install and run the program:
1. Create a new separate folder on your drive for HijackThis, move the program into thids folder, and run it from there. (Don't run HJT from within any Temp or Temporary Internet folder, and don't run it directly from your desktop.)
2. Before fixing problems with HijackThis, you must make sure to close/quit ALL instances of your web browser(s)! HijackThis cannot fully perform its fixes while browsers are running.
3. Run HijackThis, but do not have HJT fix anything yet; only have it scan your system! Once the scan is complete, the "Scan" button will turn into an option to "Save log...". Save the log in the folder you created for HiajckThis, open the log in Windows Notepad, and cut-n-paste the entire contents of the log here. The log contents will tell us a lot about what "nasties" have crept into your system, and once we analyse the log we can tell you what to do from there.