Wordpress missing a temp folder and won't upload images

I have a wordpress install on a clients local server and he's having to install wp himself.

Its almost there but I'm not able to use the image uploader as I am getting the following error over and over.

“17.jpg” has failed to upload due to an error
Missing a temporary folder.

My server guy is stuck and can't find an answer and I thought I'd ask here.

thanks,
John