1) Right-click on the Windows icon at the far left of the taskbar.
2) Near the bottom of the list, click on "Run".
3) In the "edit box", type in "cmd" and then click "Ok".

This will bring up a "command" (old fashion DOS) window. From here:

4) Use the "cd" (change directory) command to navigate to the CAESAR II program directory. Note, if there are spaces in the directory path, enclose the directory path in double-quotes.
5) Once in the CAESAR II program directory, issue the command "PREPIP". You may have to specify the path to the data directory, as in:
> prepip c:\project_1 [Enter]

6) There may or may not be a message indicating what is wrong (like a missing DLL or an issue with ".Net"). IF the problem continues, open a Support Request on Smart Support.