I was one of the unfortune people that got infected with NSIS Media, and after MANY hours of both Sweat and Blood I finally found a way to get rid of it! Here is what you do:
1) Download TrojanHunter. LINK:
http://www.misec.net2) Update and check everything and do a Full Scan.
3) It should find a Trojan in your Memory connected to your explorer.exe named something like "Adware.Cydoor.exe".
4) Then after your scan, it will rename it, and delete it.
THAT'S IT!!!!!!!!!!
Paul A.
Creator