Hi there,
Office 2007. Run fairly large sheets with lookups etc.
Often as I scroll down or up or sideways in a sheet the contents of the cells disappear.
My PC has been upgraded and does have a video card.
Often only half the ram is engaged when the problem appears.
I can force the content to display by hitting alt-tab to go out of the sheet and hitting it again to go back in but as soon as I scroll again ...same thing ..whole blocks of cells with nothing showing. Makes it very hard to work.
On a Microsoft Network if that has anything to do with it. All my files are on the server.

Thoughts/Suggestions would be appreciated.

Thanks!