[nobody7290]

I have only a few guesses:
does something run on the computer which maybe uses the same port(s) bas is using ?
Uninstall BAS, telnet to the port bas used, if you get a connect then install BAS using a different port.

Uninstall BAS, remove all instances of java, remove the java directory from program files
Try to install again.

Do you have any Java VMs running (maybe from Raid controllers for example) ?
Uninstall those, remove BAS, again install BAS

Somone in the blackberry support forums wrote, that after logging in on the computer using the account the installation of BAS was done, he was able to lauch the console.

Remove all Security Software (firewall, antivirus etc.) disable the windows Firewall
Try again to install or launch BAS.

Maybe, install a new OS from scratch (dont use a copy of a VM or something preinstalled), dont install antivirus, firewall, updates or similar. Then try again to install BAS.