Hoped 12.1.5 would home everything on installed drive

Hi all.

So this is a problem.

Have a client who has the C: partition assigned to 8GB several year ago on a 2003 server.

Symantec endpoint is hogging GB's of space on that partition for defs, cached installs and so on.

I was hoping that 12.1.5 would install all that overhead on the partition that it was installed to -- in this case E: but nope, it wants to chuck all that stuff back to C: -- why I have no idea.

Is there a way on 12.1.5 to change where all that stuff goes?  Like E:?

Thanks.