In storage, a pagefile is a reserved portion of a hard disk that is used as an extension of random access memory (RAM) for data in RAM that hasn't been used recently. A pagefile can be read from the hard disk as one contiguous chunk of data and thus faster than re-reading data from many different original locations. Windows NT administrators or users can reset the system-provided default size value of the pagefile to meet their particular needs.
I don't recommend disabling it
It's useful for your computer
Dell Dimension 5150, P-4 2.8,ATI Radeon x700 256mb, 2 sata's 80gb 160gb 7200rpm, 1gb of ram baby!
Imac G4, 800mhz, 256 ram, 160 Hd
Emachines, Intel Celeron 2.4 512ram and 80gb drive