That file is a graphics card file.

Is the server responsive? In the interest of health to the server, i'd get it backed up ASAP incase the disk(s) is on it's way out.

Prob a bit paranoid. But never be too careful.

What version of OS & Exchange are you using? I'm sure the file is available on the net, but if not i'll give you it if i have it.

Cheers,

D