I bought the PowerPack program after receiving a Windows alert regarding a registry problem and found the link to this software from the Windows site (it says it's Windows Certified!!!). I paid $39.95 for the PowerPack, downloaded RegCure and ran it. Within one day, my computer was hopelessly infected with the Antivirus System Pro virus. So serious was it, that I could not launch any programs and the constant popups on my screen would not allow me to do anything. It cost me an additional $90 to have McAfee remove the virus and one day of my personal time. Never again! I will never recommend this or any other product from this provider.