I have checked, and I have that file on my comp too, and Gnotella is working fine.
I'm running WinME though.

You have enough RAM, but the processor and graphics card is lacking. It could be a problem. But I really don't think so.

You could run the System File Checker, which will check if any of your important files have become corrupted somehow.

Press Start/Run/ and type:

sfc

and hit Enter, and I think you'll get the checker.

It doesn't work that way on ME, so I'm not entirely sure.

Then if the file is corrupt, you can extract a new one from the Windows CD(or maybe find one on the web).

Hope this helps/works.