today i downloaded a file and open it...
i had eset smart security in my windows 7 ultimate and it did n't recognize that file as a virus(latest update of eset)
sometimes eset found some dll files in windows\system 32 as trojans and cleaned them.
i reset my system and after reboot and quick scan with eset, eset showed me the error below :
Operating memory » \GLOBAL??\7571a07c\WINDOWS\$NtUninstallKB54541$\1970380924\Desktop.ini - Win32/Sirefef.DN trojan - cleaned by deleting
also i figure out my windows firewall has been damaged and i have the error below about that :
after the other reset eset did n't work so i tried to reinstall it(uninstall and install again)
but i could n't install it again because of an unknown error.
please help me to remove that trojan and fix the problems.
i searched many many web sites by google, but i could n't find a good solution.
really appreciate for help