XP, How do I find out?

Self-built system in which I would like to upgrade the 4 hard drives
This may sound stupid, but I believe it is still a dual boot system runnigng XP Home and Vista Home Premium, at least I think it is..........
I've grown fond of Vista and would like to use it exclusively, my question is how do I find out in program settings if XP is still there?
I'd like to run Vista exclusively and see no point in transferring XP over to the new drives

How do I verify if XP is still there and dump it?
Thanks in advance !

It's simple...if XP exists as a boot option when you start the system...it may still be on the computer.

If it doesn't exist as a boot option, it doesn't matter if if exists on a drive because you cannot boot into it and use it.

You can simply look at any partition/drive from My Computer/Explorer and see the contents.

Louis