You usually get this error when Oracle thinks the data file is larger than the O/S thinks it is. Fortunately this is an easy fix. As it's a temp tablespace, you can just drop the tablespace & create new. As it's operating under Windoz, you should probably make sure that each file is no larger than 4 Gbytes. I know that Windoz can address large files, but Windoz 2000 always seems to cause problems for me. I would also suggest you upgrade to XP.

But if your really gonna upgrade, why not upgrade to a real operating system.