I Can't install antivirus

I used avira until yesterday, but because of a trojan installed on a pen drive (1 file y...exe and 1 autorun.inf) Avira has stopped working. Now I'm not able to install any antivirus (I' ve uninstalled Avira). I post you the resport of the scan, I hope you can help me...
Thanks
Ottavio

What antivirus would you like to install? I just see the files of AVG, the Links to ESET ... etc.

Try to remove all antiviruses either with special tools (search at the sites of vendors) or usineg this tool: [url]http://www.appremover.com/[/url]

Close/unload all the programs excepted AVZ and Internet Explorer

Switch off:
- Antivirus and and, if you have - Firewall.
- System Restore

- [URL="http://virusinfo.info/showthread.php?t=9207"]Execute following script[/URL] in Manual Healing
[CODE]begin
SearchRootkit(true, true);
SetAVZGuardStatus(True);
DeleteFile('C:\autorun.inf');
BC_ImportAll;
ExecuteSysClean;
ExecuteRepair(13);
BC_Activate;
RebootWindows(true);
end.
[/CODE]
After reboot:
- Repeat a log file.
- Attach a new log to your new post..

THANK YOU SO MUCH! I'll do that