Draftsight 64 bit - freezing computer when starting program

Hi,

When I open Draftsight my computer freezes for about 2 minutes while the program opens up.  This happens when opening the standalone program itself, as well as when trying to open a drawing directly.  The CPU usage is at 100% while this is happening and you cannot use any other program.

 

I am using Windows 7 professional and have a high spec workstation which runs Solidworks without any trouble.

 

Has anyone any ideas on why this is happening?

 

Thanks,

 

John