| 2004-07-27 | VD.1664 |
| 2004-07-27 | VCOMM (rodzina) |
| 2004-07-27 | VCM.493 |
| 2004-07-27 | V3b.699 |
| 2004-07-27 | V3Scan.1633 |
| 2004-07-27 | Win95.Uwaga |
| 2004-07-27 | UsePascal.2406 |
| 2004-07-27 | Urod.773 |
| 2004-07-27 | Urkel |
| 2004-07-27 | Macro.Word.Why |
| 2004-07-27 | Email-Worm.Win32.Urick |
| 2004-07-27 | Urfin.317 |
| 2004-07-27 | Macro.Word.Urchin |
| 2004-07-27 | Uracil.486 |
| 2004-07-27 | I-Worm.Udater |
| 2004-07-27 | UpDown.881 |
| 2004-07-27 | Macro.Visio.Unstable |
| 2004-07-27 | Unspeed.920 |
| 2004-07-27 | Macro.Word97.Unseen |
| 2004-07-27 | Unlearned.488 |
| 2004-07-27 | Unknown1.1111 |
| 2004-07-27 | I-Worm.Universe |
| 2004-07-27 | Email-Worm.Win32.Unis |
| 2004-07-27 | Union.1449 |
| 2004-07-27 | Email-Worm.Win32.Unicle |
| 2004-07-27 | Macro.Word97.Unhelp |
| 2004-07-27 | Macro.Word97.Unhas |
| 2004-07-27 | Macro.Word.Unhas |
| 2004-07-27 | Unhandled.424 |
| 2004-07-27 | Ungame_II.823 |
| 2004-07-27 | Ungame_3.645 |
| 2004-07-27 | Unexe.425 |
| 2004-07-27 | Unerase.329 |
| 2004-07-27 | Macro.Word.UnderGround |
| 2004-07-27 | Uncouth (rodzina) |
| 2004-07-27 | Unbidden.507 |