Have you tried to upgrade from Windows 8 to 8.1 without success? Well Microsoft are doing something about it according to Paul Thurrott. An update will soon be available via the update utility which will hopefully solve those issues. Read Paul's blog here which also contains links for an early version of the update:
http://winsupersite.com/windows-8/microsoft-works-get-windows-8rt-users-updated-81
http://winsupersite.com/windows-8/microsoft-works-get-windows-8rt-users-updated-81