Virus block installing avast

Avast Free Antivirus / Premium Security
1

When I install avast the installer automatically disappear…any differrnt way to install avast?

2
  • Which OS? (32/64 Bit - which SP)
  • Which avast-version? (Free, Pro, Internet Security)
  • Which program version (7.0.1474 is the latest)?
  • Other security related software installed?
  • Where have you downloaded the installer?

DJBone