If anyone uses Kaspersky antivirus, there is process named exactly avp.exe =) you need to exit kaspersky before playing Alien vs Predator, disabling kasper will not help...
Which leaves the PC without any protection from viruses and so on ...
So, either we play the game with the trainer and with the possibility that, with Kaspersky turned off, we enjoy some viruses after ; or we keep protecting the PC with Kaspersky and can't play AvP with the trainer ...
Great situation, from bad to worse.