Fix Windows Live Messenger 2011 Sign In Error 80040154

If you are experiencing error signing in to Windows Live Messenger 2011 (installed from Microsoft update or mannual installation), following steps can help resolve the issue.
64-bit Operating System

• go to C:\Program Files (x86)\Windows Live\Shared\
• copy the 2 files
  
  • wldcore.dll
  • wldlog.dll
• paste the 2 files to C:\Program Files (x86)\Windows Live\Contacts\

32-bit Operating System

• go to C:\Program Files\Windows Live\Shared\
• copy the 2 files
  
  • wldcore.dll
  • wldlog.dll
• paste the 2 files to C:\Program Files\Windows Live\Contacts\

Fix Windows Live Messenger 2011 Sign In Error 80040154