I mean the size is not growing but I have access to it (not hidden by Dell).
I think you should check with HP if their recovery drive is automatically keeping a new backup for restore option (which I doubt) since it's created for you to recover the sytem by going back to 'factory settings'.
Can you see your D drive using Disk Management tool in Windows Vista?
I'm using a HP pavillion laptop, fairly new (bought it Nov. 2008), and the OS is Windows Vista Home Premium. I have two drives, a C drive and a D drive which is my HP recovery drive. I've never downloaded anything to my D drive, nor I can access it but I didn't really care until now. It used to only take up 7/9 GB but right now, I only have 649 MB of free space.
What could the problem be? What are the possibilities? Is my laptop unable to determine the correct disk space being used or could this be a virus? I use google chrome and my internet's been very slow these days but this could be because of I share my wireless internet with others.