The page file is what windows uses when it it runningi low on system memory ie ram. Basically it is just an allocated amount of space on your hard drive. To increase it go Start control panel>system>advance in the performance box click settings > advance ,on the vitual memory click change & in the size boxs ,change intial size to one & a half times the size of your current ram, & in the max box to three time s your ram.Click set then ok. You should find this sees you right.