Just follow these steps to solve the problem…

1. right click on my computer, click properties
2. go to advance tab click on settings of performance options
3. in performance option click on advance tab than click on change
4. here you select drive letter where you can set your paging file
5. click on system managed size & than click on set than apply, ok, ok ,ok restart your computer

NOTE : You can assign paging file on all your drives with step 4 & 5