To see what's there, you need to also uncheck 'Hide protected operating system files (Recommended)' Then you will be able to see Page files, Swap files, Recycle Bin, and anything else in there. You should remember to 'recheck' it when you're done.
I had a similar problem back in November, and alc6379 suggested this (and it worked):
Try booting to the recovery console on your Windows XP CD. If you can get into it that way, you won't be using any swap space, and should be able to format it.
Thanks Alex!
Some words of caution on my last post:
First, make sure you have everything important to you backed up on some media outside of the computer (CD's, flash drive, external hard drive, etc.); you never know what could go wrong.
I don't know how many drives/partitions you have on this computer, but when you use the Recovery Console to format, your drive letters will most likely be off by one letter. For instance, if you choose e:\, that will probably be what you commonly know as your 'f' drive. Before you format any drive, use the dir (Directory) command to be sure the drive you are about to format is indeed the one you want formatted.
The Directory command would look like this:
e:\>dir Then, when you hit Enter, the contents of the drive will be listed. The one you are looking to format should only have a couple of small files listed.
<I hope this isn't too 'wordy' and makes some sense

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