Affected Operating Systems
Recovery Instructions:
Please follow the instructions for removing Trojans.
Delete any unwanted dropped files.
You will also need to edit the following registry entry, if it is present. Please read the warning about editing the registry.
At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.
Locate the HKEY_LOCAL_MACHINE entry:
HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce\MsnMsgr
and delete it if it exists.
Close the registry editor.