DCTP Forums

I can't say anything about Akemi's professor because I don't remember enough about that part to say, but as for Agasa saying the drive was strange:

depending on the method if encryption it's possible to analyze a volume and determine whether or not something encrypted is likely to be there, so he could have analyzed the disk and thought to himself "If this disc is just supposed to output this one line of text, why is there this huge area that might be encrypted? Something's fishy here." Also if the disk was meant to show its full contents when a password was input, unless it depended on an external program, the encryption/decryption logic that accepts the password would have to exist somewhere unencrypted on the disk, which Agasa would probably be able to find.

More likely though I'm guessing there wasn't much more thought to it than "Agasa is good with technology thus by TV rules he's the one who gets to divulge tech-related secrets to advance the plot".

probably because the virus only work when the file contain BO info is been open without using BO computer. not normal text file that open when password not entred

He was able to acces it because he didn't try to enter a password.
The Virus only comes out when you type in the password on a non-Bo computer.

about the "strange" thing: like the others said, he might have seen that there was more data on it htan were visible.

My Opinion

The virus was written so if the Bo data was read by a program not running off an Bo Computer, then the data on the disk would then be completely destroyed. You can have a virus only affecting only one file or directory. As long as you do not access that file or directory, nothing happens. If the Professor did indeed look at the disk, he would be able to see fast that, that disk was not his. It is also possible the Disk was password protected and since the data was not run on a BO computer, the virus activated and the disk was destroyed.