Bad Wolf virus
From Tardis Wiki, the free Doctor Who reference
The Bad Wolf computer virus had erased all information on Rose Tyler from the Torchwood Institute database. (DW: Love & Monsters) This was presumably done by Rose Tyler as the Bad Wolf entity in The Parting of the Ways when she scattered the phrase Bad Wolf throughout space and time.
Notes
The Doctor offered Mickey Smith a computer disc containing a virus which, if activated, would erase all mention of The Doctor from the Internet. (DW: World War Three)
