Photoshop Elements 9

I upgraded from Elements 5 to 9 using the full version and the computer started playing up. It's a Pentium 4 with 3GB of ram, separate graphics card and running XP. My computer man tells me you really need a dual core processor to run Elements 9. Anyone else had bother?

Cameraworld have Elements 9 at £49.99.

http://www.cameraworld.co.uk/ViewProdDetails.asp?prod_code=PON09L000072&Prod_nam...

Dan