Avast did not find Trojan:Win32/Kovter.C

Avast did not find this trojan but Bit defender did. I would notice my hard drive always active for weeks it would go crazy every time i connected to the internet. Bit defender updated and found i had this trojan on my computer and removed it. Every since its removal my computer is very quiet. I shocked that the free program caught it and avast did not. when i try to activate bit defender it tell me i cant but avast is active.

NO security program have 100% detection or zero false positive. If they did there would not be a malware problem

Do you have bitdefender and avast installed?

Why Using Multiple Antivirus Programs is a Bad Idea >> https://blog.kaspersky.com/multiple-antivirus-programs-bad-idea/2670/