Sue, I don't have the administrator option-the two I have are JAN/owner and other person.  Under mine, I have two options, protection against nasties and no protection.  Under protection, Carrara comes up with 3/4 of everything missing.  However all the menus work, but I can't render etc.  With no protection, I get everthing.  However 29 times out of 30, the file and edit menus aren't working. On perhaps the 30th try everything works fine.  Freezes and menus not working have been getting progessively worse for the last couple of months.  If its fine tomorrow morning like it was this morning, it may be a computer heating problem.  Well, tomorrow, I've decided to get a new one for around $990 bucks ($899.99 plus 89.99 tax).  Its gonna be a Dell XPS430-121B-6Gigabytes DDR3 RAM, Intel Core 2 Quad Processor Q8300, a budget Radeon HD 3650 Video card 512 MBytes  (I have a Nvida something 32 MByte one now).  Funny thing, the new one costs less than the old one with 10 times the RAM.  Jan