This may help. Basically a manual version of TDSS killer, but sometimes that's the only way that will work. Copied the procedure from another website. Hope it helps.
Go to Start > Control Panel > System > Hardware > Device Manager > View > Show Hidden Devices.
Scroll down to “Non-plug and Play Drivers” and click the plus icon to open those drivers.
Then search for “TDSSserv.sys”
Right click on it, and select “Disable”
If you select Uninstall, it will install itself again when you reboot the system, so DON’T select Uninstall.
Restart your pc.
You can now update your Antirus/Malware/Rootkit software.