I bought a computer with Windows 8.. Did not like it so I installed Stardock 8 (Not trial version).  Whenever I am away from my computer for any length of time the Stardock (Start) icon disappears and everything is locked up.  I can go to Windows 8 and work from there but I hate it.  This also happens randomly.  Sometimes I will walk away from my computer for 15 mins and it will happen and sometimes I will leave it for a day and it won't.  Per someone's advice I reinstalled Windows and then reinstalled Stardock 8 and it did not help.

Any ideas???