Norton family will not run after install

I have managed to install it on 3 out of my 4 pc's but the last one just wont have it.

 

It downloads and goes threw the install ok as far as i can see, but then will not start up for me to log on to it.

 

Tried having someone from technial support do it but he only managed to remove all my other computers from the management page and did not get it to work ont this one