The file "MediaPortal-Error.log" shows many errors that have this Windows error code: 0x80004005.
This page suggests that you should run Windows Update to fix the software error that causes this problem.
-- from CyberSimian in the UK
Thanks for your reply. In Win7 this error appears to be for an "unspecified error". I'm sure there is some sort of issue but everything works ok in general and I don't think it relates to the problem I outlined.
Thanks