Note: Windows XP
To find out how much memory your computer has left on its hard drive, go to "My Computer" from the start menu, then click
once on the folder that says "Local Disk (C:)". In the bottom left hand corner there should details about the drive telling the space left on it.
As for your system details I know how to find them only on DELL computers. Restart your computer, then as it is starting up again, when the DELL name appears with the loading bar under it, press F2. Then navigate the lists with the arrow keys until you find stuff about the hardwear your computer is using. It is a little complicated, but I am sure you will be able to figure it out. If not, wite back.