well, if your sure that you have a full version, then zeroing out the HDD would be the way to go. Thats up to you, though. A format does NOT wipe out the HDD nor does removing a partition. It just wipes out the master alloc table. Its up to you, though, if you want to try it. If you do, just goto western digital or which ever drive manufacturer, but I know western digital is called first aid.
If you argue with an idiot he will drag you down to his level and beat you with experience.
I am not a fast writer.
I am not a slow writer.
I am a half-fast writer.