Trojan.Zlob.d is a variation of Zlob.Trojan. This is a malicious program involved in various commercial trickeries, especially in malware propagation. It is understandable that one should remove trojan.zlob.d for computer and data safety purposes. At the same time, there are a nameless trojan and adware which produces alert stating that you need to remove trojan.zlob.d and [...]

Source: http://hands-oncorp.com/2008/12/11/trojanzlobd-removal-tool/