V=I=R=U=S – W32.HLLW.Raleka – Can’t Del

I’m trying to remove this virus from my NTFS, Windows XP, boot partition, as Norton Anti-Virus can’t. I keep gettibg “Unable to Delete – Access Denide” messages from NAV. Symantec are useless, they can’t, or won’t suggest anything other than doing an on-line scan, but as the PC wants to reboot every few minutes I can’t complete the scan ! I have tried to stop the infected file svchost.exe in task manager but it just starts up again and starts the countdown to reset again.
As the partition is NTFS I can’t access it from Dos, I can’t see anyway of preventing it from loading so that I can delete it.
Any help most greatful for.