| 2004-07-27 | Ornate |
| 2004-07-27 | Ordure |
| 2004-07-27 | Macro.Word.Ordo |
| 2004-07-27 | Orchid (rodzina) |
| 2004-07-27 | Orange.337 |
| 2004-07-27 | Oppressor.559 |
| 2004-07-27 | Opera |
| 2004-07-27 | Net-Worm.Win32.Opasoft |
| 2004-07-27 | Opal (rodzina) |
| 2004-07-27 | OpalSoft.1599 |
| 2004-07-27 | Oops.600 |
| 2004-07-27 | OopsTmp.1087 |
| 2004-07-27 | Ooops.368 |
| 2004-07-27 | Oolong.1380 |
| 2004-07-27 | Macro.Word.Onyx |
| 2004-07-27 | Ontario (rodzina) |
| 2004-07-27 | Onkogen.1683 |
| 2004-07-27 | Macro.Word97.Opi |
| 2004-07-27 | Macro.Word97.Onex |
| 2004-07-27 | OnFire.1679 |
| 2004-07-27 | Omi.986 |
| 2004-07-27 | Omega.440 |
| 2004-07-27 | Macro.Word.Olimpic |
| 2004-07-27 | Olgi.480 |
| 2004-07-27 | Olga.483 |
| 2004-07-27 | Olexy.1864 |
| 2004-07-27 | OldScribe.8588 |
| 2004-07-27 | Ol.1562 |
| 2004-07-27 | Ohm.777 |
| 2004-07-27 | Ohlala (rodzina) |
| 2004-07-27 | OhOh.799 |
| 2004-07-27 | Oggo.3837 |
| 2004-07-27 | JS.Trojan.Offiz |
| 2004-07-27 | Macro.Word97.Oetzi |
| 2004-07-27 | Oddessy.602 |
| 2004-07-27 | Macro.Word.Ochoy |