Norton is quite a resource hog
I am wondering if you apporeciate exactly what a page filke is? if so, then please accept my apologies for the egg-sucking that follows. Basically, your PC has several types of storage media:
ROM (EEPROM)- non-volatile storage for BIOS information - the white text on black background you see at startup is from the BIOS. Holds information about your hardware and tets it at startup.
RAM - volatile memory where programs actually run - nothing (permanently) stored there except variables and data being used by the program. Typically 1GB+ these days. Chunks of silicon with millions of transistors. Accessed in nanoseconds. FAST
Hard disk - programs are stored there - over a million times slower than RAM for read/write operations (milliseconds rather than nano seconds to access). Much slower as it is a magnetic media with spinning platters (disks) being read. SLOW
Well, the swapfile (page file - effectively another name for the same thing) came about becuase in the good old days (when I built my first PC), RAM cost the earth and typically one might have tens or hunderds of MB, not GB. The first one I built had 10MB hard disk and 128K of RAM
. So, Windows used hard disk as temporary storage for stuff that was not accessed to often but required 'memory' to run in or for storage.
Your swap file is hard disk being used as RAM and even these days itr is essential as with the increase in RAM in PCs came a more resource hungry Windows OS and more hungry apps (3D type graphics packages uses bags of RAM during operation for instance.). Windows manages swap files very well these days and it is rare for a problem to be casued by it unless your hard drive is getting very full - the swap rfile is dynamic and might require a bit more space when you have a dozen programs runnign at once.
So, the swapfile is a neccesity and is unlikely to be the source of youir problem IF you do not have too many applications running at one time - check free memory rather than page (swap) file.
By the way, Itunes 7 is known to be very resource hungry too.