Sorry if this has been asked before...

I keep getting this dialog box when doing top-down modeling...inserting a new part onto an assembly:

"The default templates are not valid.The problems can be resolved by
correcting the default templates under the options dialog. Do you want
to continue with a blank template."

I get this message other times also.

How do I remedy this?  I am using Solidworks 2010 service pack 4.0. 

Also, speking of top-down modeling, when I go to save a new "child" part (created from a surface of a parent assembly) the default file name is, let's say for example is partxx.  I don't see any option to change this name to a real part number name, and have been using SW Explorer to change the file name after saving as partxx.sldprt. This is an annoying work-around, I must be doing something wrong / not seeing something.

Any help here is greatly appreciated.

Thanks.