this is my final resistance to trojan DNSChanger

I've tried to follow instructions for other people you gave but I really don't know enough about computers to remove it. Allready asked some "computer guys" here but they can't fix this, I live in a student dorm, we have LAN and we're all here infected but no one can fix it, if you help me I'll try to proceed informations to as many students here I can
Before it was enough to scan and remove DNSChanger with Malwarebytes Anti-Malware but now my log say's that it's removed and quarantined although whenever my computer reboots as requested by Malwarebytes DNSChanger is still there and is changing my DNS server to 85.255.112.36 and 85.255.112.41. I have licenced NOD32 2.7 on my computer but it doesnt have a firewall so I've tried some firewalls (comodo,outpost) but don't know enough about using them so didn't help and have uninstall them, now I just have windows firewall. I've removed from add/remove programs what I've found as malware software, HijackThis doesnt show these servers on it's log and I do not dare to fix anything cause I don't know what other problems could I cause. Malwarebytes log says that infection is only on Registery data item. I hope you'll help cause I really need internet and now I write this only cause our supervisor gave us alternative server number to use in emergencies. Greetings from Croatia.

 

first of all, thank you for wanting to help me!
1. there was not TDSSserv
2. had no malware programs installed (although I've already few days ago uninstalled AskToolbar), and Java is taken care of
3. have followed the steps and with SuperAntispyware, Spybot and Malwarebytes was no problems, but
- I can't install Combofix cause of the troubles with NOD32 interfaceing although I disabled NOD32 it still runs when reboot, also Combofix starts normally and then when it's shown "scanning" it stops and reboots my computer (laptop,actually if it matters) itself, window that says that there is a problem with NOD shows and I had to terminate program
- Also could not use MGtools cause NOD says that's infected and it doesnt allow me to install it:
danger: C:\MGtools\Process.exe Win32/PrcView application
I know that it probably isn't infected but didn't dare to install it cause usually do that when don't understand something (don't laugh if I'm beeing silly :confused)
4. have disabled and then enabled system restore
Now it seems that my computer is clean but somehow I think that it'll be back as always..rolleyes
I'll attach logs that I have now
Thank you and hope for another answer, relly want to sort this out once for all :wave

 

ok, I'll do that and get back in a few days, just wanna ask if it's ok to install MGtools cause Nod was warning me about it?

p.s. it's back again today, yesterday was fine but today I had to change server number to connect to the internet, also after a while it hijacks the other server number even though I always switch to obtain before shutting down computer
thank you again for the effort
:wave