8tunes activates 30 minutes after you run an infected file, when it plays a (loud) song over the PC speaker. Every three minutes after this, it plays another song, out of eight possible random songs (for some reason, while recording this, the virus only wanted to play three, so sorry you won't get to see the other five).
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Virus.DOS.8tunes or 8tunes is a memory resident parasitic DOS virus. When the virus is loaded...