Trojan.Zeroaccess!Inf in Services.exe: How to remove?

Hi,

 

As many others I do have a persistent Trojan on my laptop: Trojan.Zeroaccess!Inf in services.exe

It was identified by Norton 360 a few days ago.

Tried the Norton Power Eraser and the suggested Removal Tool without success.

 

My system:

HP Elitebook 8530w

Windows Vista Buisness 32-bit, Service Pack 2

 

Any help to remove this is highly appreciated.

 

Thanks,

Mark