Windows Live Solution Center (WLSC) was originally intended to focus on problems and solutions for Hotmail. Now, it seems Microsoft updated Solution Center to support all Windows Live services. Not only this, but Microsoft is making WLSC the “evolution of consumer support for all Windows Live products”. What this means is that Microsoft no longer offers Windows Live email support to its users, and instead the Windows Live support team (those tagged with “Windows Live” or “MSFT” in their username in the Solution Center) will provide 24/7 support to its customers using the forums on Solution Center. Note that email support is still available for Windows Live paid subscription customers for Billing enquiries and problems.
More info: WLSC FAQ