first you must verify your .NET Framework with this useful tool
http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx
http://www.registryquick.net/runtime/Fix-Runtime-error-1026-How-to-Fix-Runtime-error-1026-39453.html
and last please check this links , whatever i may be help you !
http://social.technet.microsoft.com/Forums/en-US/46f558ec-9884-45ac-8021-7fbec962fe5f/sharedservicesexe-crash-3-services-not-starting?forum=smallbusinessserver2011essentials
Roger