The reboot shouldn’t cause the the virus to kick in again and reinfect the MBR if it was only the MBR rootkit present. You also said “I am now frightened to press Fix in case it reboots me to the previous state” and you later downloaded and ran TDSSKiller. So I don’t see where you ran aswMBR and clicked the Fix option, confused.

The aswMBR log you posted doesn’t show the presence of an MBR rootkit but the default MBR.

02:27:23.038 Disk 0 Windows 7 default MBR code

So it looks like you are clear of that TDL4 Rootkit according to the aswMBR log, are you getting any further detections or symptoms ?

The information on bleepingcomputer.com is going to be stating different information as it isn’t a guided tutorial, but one that you are doing on your own without guidance. So installing/uninstalling random applications could complicate the issue.