When executed, the infected program opens a window entitled "Happy New Year 1999 !!" and shows a fireworks display to disguise its installation. This worm sends itself to other users when the infected computer is online.
The following error messages can be symptoms of Happy99.Worm:
"MSIMN caused an invalid page fault in module Kernel32.dll"
"MSIMN caused an invalid page fault in module unknown"
"Explorer caused an invalid page fault in module Mailnews.dll at 014f:62060a0f"
"Outlook caused an Invalid Page Fault in module Unknown"
"MSIMN caused an invalid page fault in module Inetcomm.dll"
For additional information on these errors, see the Microsoft Knowledge Base article OLEXP: Error Message: "Invalid Page Fault in Kernel32.dll" with Happy99.exe Virus
, Article ID: Q221486
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