On a older very slow laptop with windows XP service pack 3 Norton scan found zeroacces, partially removed it. I then downloaded the zeroaccess removal tool- fix zeroaccess will not run. I get error message "tool failure-must 1sy be run without post boot" this is way over my head but would welcome any help that is offered. I am currently running a spybot scan but for some reason don't think that will solve my problems. Thanks in advance for any assistance.