tdsserv virus, trojan Adware, spyware problem?

ok i had this trojan adware problem that is quite common. i managed to disable it in device manager meaning I could now open and use anti spyware program etc. They found it, deleted it but on reboot it will always reappear. doesn’t affect my pc as the system process is disabled but after a few seconds I get a warning from AVG that there is a tdsserv trojan. i delete it and it comes back on reboot. Where abouts is the root folder that I can get rid of whatever it is installing this on every reboot. Thanks
got all of those! all updated etc. none seem to remove it completely. even with boot scan
i managed to get rid of it manually from registry. thanks

You ran SuperAntiSpyware, MalwareBytes, and Combofix. and it’s still there? You need to run Super and Malwarebytes in safe mode. I would also disconnect from the Internet . When done run ComboFix. That should do it. You can also finish it up with an Anti-rookit tool. Here’s two the second one is good but for experienced users. Use at your own risk.

http://www.download.com/Panda-Anti-Rootkit/3000-8022_4-10717196.html

http://www.gmer.net/index.php

Windows7 Utility Process Startup Manager processeye (processeye.altervista.org)

Bitdefender Internet Security 2010 – 3 Pc/2 Yr [OLD VERSION] $0.01 Internet Security 2010 Value Edition 3PC / 2 Year includes Antivirus, Antispyware, Antiphising, Antispam, Firewall, Laptop Mode, Parental Control, Hourly Updates, IM Encryption, Network Management, Windows 7.0 compatible…

Bitdefender Antivirus 2010 -3 Pc/1 Yr [OLD VERSION] $5.99 Antivirus 2010 3 PC/ 1 Year ncludes Antivirus, Antispyware, Antiphising, Hourly Updates, IM Encryption, Network Management, Windows 7.0 compatible…