How to increase virtual memory

Please note:

Things in the brackets are action signals. Like Right
Click, Select, Click Tab, Click Button, so forth.

[Right Click] My Computer
[Select] Properties
[Click Tab] Advanced
[Click Button] Settings(Under Performance)
[Click Tab] Advanced
[Click Button] Change(Under Virtual Memory)
[Select Drive] (Select the drive you want to add the
virtual memory to.)
[Check] (I would suggest to check System managed size as
this would allow the system to automatically set the
virtual size)
[Click Button] Set (Under Paging file size for selected
drive)
[Click Button] OK (Virtual Memory Window)
[Click Button] OK (Performance Options Window)
[Click Button] OK (System Properties Window)

Hope this helps.

-----Original Message-----
When I try to open a long Powerpoint presentation I get
this message.
"Increase the size of virtual memory paging file".
How do I do this?
.