Download free Microsoft Security Essentials and install it (antivirus). Restart your computer. Open up task manager and google any applications or services running that you don't recognize. If the google tells you it's malicious, right click and hit end process. Restart again. Reset or reinstall your internet browser if all else fails.
I'm sorry, I didn't read clearly. How are you posting here if your browser (IE) is gone?
True that. Pretty amazing what you can accomplish through common sense and process of elimination. There is an immense wealth of support information for pretty much everything - guaranteed someone has probably had the problem before and found someone online with answers!
So you're using a malicious browser called Search Conduit, or are you using another internet browser besides IE?