Bad Wolf virus
From Tardis Wiki, the free Doctor Who reference
Someone, presumbably, the Doctor, had erased all information on Rose Tyler from the Torchwood Institute database, using the Bad Wolf computer virus. (DW: Love & Monsters)
Notes
The Doctor offered Mickey Smith a computer disc containing a virus which, if activated, would erase all mention of Mickeyfrom the internet. (DW: World War Three)