Trojan Win32.Swizzor.dh Found!

I just managed to remove some threats after being informed by my server firewall that the subjected trojan virus was found. I was using MS anti-spyware beta1 to troubleshoot my user pc. Not bad. Found some threats and removed. But then how come the next day these threats are found back again??? Please help…I have disabled his system restore before remove that threat. Symantec Antivirus is unable to detect this trojan 🙁