"Signing in to Windows Live Messenger failed because the service is temporary unavailable." Error Code: 800701f6 or 8100030e.
Tips to solve this error:
1) Register softpub.dll.
Click Start Button, then click Run, type regsvr32 softpub.dll. Restart MSN Messenger or Windows Live Messenger.
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2) You may need to MSN Messenger (Windows Live Messenger) to the allowed list of programs in your firewall.
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3) Double click on the clock in the Windows taskbar and make sure the system clock is set correctly.