BAT.Haha is not very destructive, but still really annoying parasite, which is able to produce a lot of problems to the user of the infected system. On of the main actions, available to this pest, is disabling the mouse. This can often paralyse the work of many inexperienced user. It's clear that this parasite should be removed from the machine as soon as possible.
Trojan.BAT.MouseDisableBat/haha