Some of the properties associated with the solution could not be read

Visual Studio when opening a solution.
“One or more projects were not loaded correctly”
“Some of the properties associated with the solution could not be read”

Following did not work really, but does discuss the corrupt solution file, which may have a different number of projects to those attached to this solution.
http://blogs.msdn.com/b/rjohri/archive/2010/03/11/some-of-the-properties-associated-with-the-solution-could-not-be-read.aspx

Alternative is to create a new solution and add the projects to it.

Also am finding that Windows 7 machine, moving to XP machine, is making XP machine files read-only. This may be part of the problem.