Note that you should scan/clean your PC in SAFE MODE (Windows Safe Mode can be entered with continously pressing F8 button before Windows starts to loading). This is VERY VERY IMPORTANT for successful cleaning!
Please download HijackThis http://www.greyknight17.com/spy/HijackThis.exe - this program will help us determine if there are any spyware/malware on your computer. Create a folder at C:\HJT and move HijackThis.exe there. Double click on the program to run it.
1. If it gives you an intro screen, just choose 'Do a system scan and save a logfile'.
2. If you don't get the intro screen, just hit Scan and then click on Save log.
3. Get HijackThis Analyzer http://www.greyknight17.com/spy/KRC%...20Analyzer.zip and save it to the same folder as the hijackthis.log file. Run HijackThis Analyzer and type in 'y' if you agree. The 'result.txt' file will open up in Notepad. Copy the whole result.txt log and post it in the forum. You don't need to post the original hijackthis.log (unless we ask for it). Do not fix anything in HijackThis since they may be harmless.