My PC has one disk divided into 2 partitions. The second (which in Disk Management is referred to as 'Boot'and 'Logical') appears to contain the OS although there is a WINDOWS folder on the larger partition (labelled as 'System and Primary'). The smaller one is extremely short of space and I am trying to remove the partition or change them over so that the larger one is the main drive. Being virtually useless with technology I would appreciate any advice. As a new user I am not able to add screenshots, however I am going to try the other suggestions, thank you. Sorry, haven't quite got the hang of this forum, the way replies/posts and edits work.
You cannot non-destructively modify partitions from within Windows XP – especially not if they contain the operating system itself. (In Microsoft's backwards terminology, the "boot" volume contains the operating system itself, and the "system" volume only has the bootloader.)
However, you can use GParted from a "live CD" to resize the partitions; an Ubuntu Linux CD might be easier to make (instructions), although there is a bare GParted Live as well. After booting from the CD, open GParted and use the "Resize" function.