How to remove w32 blaster?

My store's computer is infected by "w32 blaster". That is what it says on my task bar on the bottom right of my screen, and I cannot open any programs. Every file.exe is infected by "w32 blaster". A malware program says it should be activated to clean and restore the system, but it needs a subscription. I have tried running symantec and sophos w32 blaster removal tool on safe mode, but they both could not find it. So could it be that it is not the w32 worm, but something else, even though it says "infected by "w32 blaster"...? System restore does not work, and I disabled it when I used the removal tools.