There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.
Trojan:Win32/Conedex.A is a trojan that acts as a container, and may contain malicious script that can have virtually any purpose.
What to do now
To detect and remove this threat and other malicious software that may be installed on your computer, run a full-system scan with an appropriate, up-to-date, security solution. The following Microsoft products detect and remove this threat: