Hello Nt monkeys

I have 2 questions;

Firstly what is the pagefile.sys on the root of my drive?
Can I delete it?

Also everytime I run the P&D program on my NT machine the actual installer wants to restart the PC before I run it, theres about 8 files which gets installed prior to the Blue faded screen and NT complains they are out of date. Is it possible to stop this or do I have to just lump it??

Cheers M'Dears

G