Hello, today (morning), to connect my computer just noticed that my antivirus (avast! Free 5) had been uninstalled (I hadn’t given orders for it). Later ,i reinstalled the antivirus and restarted the computer to see the result: the antivirus was uninstalled (AGAIN). I did the same several times but the result was always the same, and I have no other antivirus or even registry files of competitive products. Probably, it’s not a virus because i have already experimented with other antivirus and they are not uninstalled when Windows is restarted.
What do you mean by uninstalled? Disabled? Or files are disappearing?