I'm not very familiar with the latest versions of Ghost or Systemworks, but from what I know...

1. It's common for laptop vendors to reserve a partition on your HD for "backup purposes." I assume - based on the fact that your D: drive was originally labelled "backup" - that Dell configured your laptop in this fashion.

2. Systemworks probably wouldn't "take over" an entire partition then make it unreadable. I know that Systemworks reserves space on your drive for various rollback features, but what you're describing is a partition on your hard drive that Windows can't read. I highly doubt that uninstalling Systemworks will make the partition accessible.

3. Time to call some guy in India for help. It's possible you'll need to boot your laptop into recovery mode and reformat the partition - NOT the whole drive, just the partition - because when Windows reports a drive as "raw/unformatted," you're pretty much F'ed.