Happy-2008.exe removal advise

I found on a machine that was flooding our network internally happy-2008[1].exe in the windows\prefetch folder.

I am asking for advise on how to remove it, the machine will probably be reformatted but since a fresh install of nod32 did not detect it I am wonder if it is a false alarm or why it went undetected.

Note the machine was not on the network when scanned, it also has starware malware on it. Windows XP Pro

I have read that it is a trojan and can hide it's own process and security wise this is new to me, I mainly deploy new PC systems and this one was installed before I joined the company. Currently our network is behind a firewall with CISCO routers I believe. Also for AntiVirus AVG enterprise is used - not the server edition, running are AV and anitspyware components.

Just looking for some tips, Thank You.

 

 

 

 

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