Had To Switch Hard Drives - Now I'm Being Prompted to Pay Again

I have a pathetically small c: drive.  (I can hear the jokes now!)  I was getting notices about running out of room on it, so made the decision to move and delete some things.  

 

The first thing I moved was my Office Professional Suite 2010, which went through without a hitch (uninstalled then re-installed with disc).  The next was Norton, since I noticed that it used a lot of memory.  So I removed, and then re-installed to my d: drive.  Now that I've re-installed it, it's converted over to a trial period and I'm being asked to pay for it again.  I had well over 100 days remaining on my previous subscription.  I would prefer someone from Norton/Symantec address this as to how I can get back my original subscription status.  I don't feel that I should have to pay for it again simply because I was moving it to a different drive.  If anybody else out there has had this happen, I'd like to know what the result was.