I have very similar problem,WLMplus simply won´t remember my pass and username,when I restart PC or shut them off and next time run WLM:8.1 with messenger plus!live add on (4.80.0.356) I need to enter password and username again and again to turn on remember me an remember my password !
This started to happen after updating WLM from 8.1 to 2009 version (14.0.8024), but still remains after reinstalling 8.1. version.
Probably this is related with spyware but I would like to hear some opinions form other users,although It would be ideal to hear some expert opinion especially if it will be from MSN support.
Looking forward to your replies,especially to your help
P.S.
Option Allow automatic sign in when connected to internet turned on, Option This is shared computer... is turned of