Help - installing Avira anti-virus

[dimasalang]

help naman mga bro, kasi may virus yung pc ko, so i downloaded the installer for the avira anti virus.
but when i tried to install it, the installer will be there for a few seconds then it will automatically close.
tapos pag inulit mong i launch yung installer, di na siya lalabas.

help naman nga bro, i need to get this virus out my pc.