I tried at least 5-6 times to install the avg free and pro trial antivirus programs and the panda free antivirus software and keep getting the error message during the installation process 0xC0070643. I have run adwcleaner and house call and apparently there's something on my computer that wasn't deleted in the past that's keeping me from getting an antivirus on my computer. It is a msi laptop running windows 7 home premium. Please help!!!