Because no one is claiming




was missed, then found. The DT is claiming
links to 


sites were missed then found. These are text files, URL's, showing the computer was once directed to




sites, and in this case no one is disputing at least partially through the action of viruses. Maybe intentionally too, but imo that's impossible to prove.
Anything a person could possibly do with a computer using a mouse or keyboard can also be done by a virus, except write 'War and Peace' or other creative work. Linking a computer to




sites is not only possible for a virus, it's what many of them were written to do, and making it appear as if they were typed in is
trivial. The original experts were asked if there was




on the computer and they said no. They were right, and there still isn't. What was 'missed' but actually never asked, was "has this computer ever been to




sites?" This is what the current defense has found.
Regarding the original claim that there were no viruses either, I would point out the difference between active viruses and quarantined ones.
I'm not claiming nothing was missed by the original expert
s but I will point out that this detailed an analysis of
Travis' hard drive was never central to the prosecutions case.At this stage, however, the defense seeks to miss no opportunity to smear Travis and/or implicate the prosecution in wrongdoing. Even if they fail they still succeed via delay.