I downloaded some add-ons as part of something else and then deleted them but one of them which is variously called PC Confidential Winferno or registry cleaner keeps appearing when I turn on the PC as prompts to buy the product, listing sites I've visited etc, which is a bit worrying. The other things deleted easily like toolbars for the internet but this wont go away. Ive tried searching the names in a search box and deleting the file locations but the messages wont stop coming up. Any help?