sporder.dll could be a WinSock2 reorder service providers (a module associated with Windows 2000) or a Backdoor Trojan.Riler.B.
It is a system file that does NOT contain the malicious code but it’s used by the trojan in order to work.

Are you using Windows 2k? I have XP and don’t have this file in my computer…

Which other security applications do you use?
If you Google you’ll find some false positives related to sporder.dll.

It will be good if you download, install, update and run other trojan remover tools: a-squared, Free AVG Antispyware or SUPERantispyware (trojan removers). Some users recommend Spyware Terminator.