Being run this trojan shows a messagebox 'This is user-friendly Windows 98' and starts to randomly move mouse pointer. It also blocks keyboard so you can't kill the trojan task in Task Manager and continue working with other applications. The computer has to be reset - all unsaved data in opened applications will be lost.
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.
Technical Details: Alexey Podrezov, F-Secure