A corrupted cache can stop users from signing into
Windows Live Messenger 9.0 (2009) with their Live ID accounts. According to Microsoft, the issue is not limited to just the latest iteration of its instant messaging client, as older versions of the software are also affected by the same problem. “Some users seem to be getting an error 8100030d when they try signing into Windows Live Messenger, in some cases after they have upgraded to the latest version. This error can be caused if the cache files get corrupted and the solution is to simply delete the cache,”
Sameer Halai, Windows Live Messenger program manager, revealed.