Install Failure OSX 10.8.5

Here’s my syslog from the install failure:
Oct 22 08:10:49 RCB-MAC fseventsd[47] : Logging disabled completely for device:1: /Volumes/avast! Free
Oct 22 08:11:00 RCB-MAC kernel[0] : CODE SIGNING: cs_invalid_page(0x1000): p=225[ksadmin] clearing CS_VALID
Oct 22 08:11:02 RCB-MAC gcapi[224] : can_install: 0, reasons 1
Oct 22 08:11:02 RCB-MAC Installer[219] : Chrome already installed
Oct 22 08:11:02 RCB-MAC Installer[219] : CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces.
— last message repeated 2 times —
Oct 22 08:11:17 RCB-MAC coreservicesd[61] : Application App:“Installer” [ 0x0/0x17017] @ 0x0x7fea8d1003a0 tried to be brought forward, but isn’t in fPermittedFrontASNs ( ( ASN:0x0-0x19019:) ), so denying.
Oct 22 08:11:17 RCB-MAC WindowServer[111] : [cps/setfront] Failed setting the front application to Installer, psn 0x0-0x17017, securitySessionID=0x186a2, err=-13066
Oct 22 08:11:46 RCB-MAC Installer[219] : CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces.
Oct 22 08:11:46 RCB-MAC Installer[219] : The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.

Hello,
more details can be found in /tmp/avastpostinstall-*.log

Best Regards,
Martin