Disappearing installer

[Plazmacs]

Hi there, I've got following problem:
When I try to install F@H, as I open the installer file, the installer window appears for ca. 1 sec, then disappears before I could do anything. The installer file also disappears with it.
I tried using different browsers for downloading, also disabling my antivirus software (I'm using Avast Pro), but still no success.
Any ideas?

[bruce]

Is your security software treating this as a virus? If you got it from the approved source, it's not unless you've got bigger problems with viruses that has managed to evade Avast.