Problem with Backdoor Trojan

[David1970]

I have a backdoor trojan and 2 other trojans from not using a firewall.  The backdoor trojan was called Trojan  horse  backdoor  generic  12  benL-   It was caught by AVG in a helper.exe file in Java after about a week of suspicious activity.   The other two were detected by MallwareBytes,  I deleted it from the quarantines.

So far the intruder have been playing with my newsticker program and selecting topics on his own.  He also tried to open my weather gadget.and opening up menus.  I could not use System Restore.

I've been told that if this trojan has rootkits, it can survive a re-format.  How can I find out I have rootkits?

So far I have seen none of the backdoor activity since installing comodo as my firewall. 

How can I get rid of these trojans without re-formatting my computer?    I am not an expert on these things.

David

[Corrine]

Hi, David1970.

Please post the logs shown at Log Posting Instructions (as requested previously).

Thank you.