First, sorry for my typo and luckily you found the folder.
Second, this is a critical error that non paged pool memory is low. If you have /3G switch in boot.ini, please remove it. If you must use that switch, consider the workaround in KB934878.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;934878
Besides, sometimes malware can lead to such situation, so please try to do some health check on this server.
Regards,