Norton did not detect 15+ viruses, and other antivirus did

Norton Security | Norton Internet Security
1

I recently got malicious adware on my computer by verifying that I am human. I did the normal procedure of removing extensions, clearing browser cache etc, the necessary things to remove adware. I then ran Nortons Full System Scan, and Nortons Power Eraser. They both found nothing. 

I then decided to try a different anti-virus to be sure. Because I knew the adware was not just going to give me ads. After running the 2nd software they found 5 Registry value, 2 folder, 8 registry key, and 5 file threats. 7 of which were trojan viruses, 3 were PUP (I understand norton doesn't detect these), and the rest risk and adware. 

This is very disappointing as I expect an anti-virus so positively reviewed and expensive to at least detect all trojan viruses. 

2

Yes, I used Malwarebytes as a second-opinion scanner. They found the trojans, adware, etc. Norton has always been good to me as it has blocked many sites for me many times. It was just a little worrying to see all these different types of malware found through Malwarebytes and not Norton. 

I was worried that they were stealing different types of information through my drives. 

3

I use Malwarebytes as a second opinion on demand scan. It focuses on things that Norton does not, such as PUPs and adware.

There are many users here that even run Malwarebytes real time protection alongside Norton. Malwarebytes support has articles on what items you need to exclude from each other's scans. Although some users have not even set up the exclusions and report no issues.

 

4

Do you recommend Malwarebytes as a second-opinion scanner?

 

5

No single security program can protect you 100% of the time from 100% of the threats that are being released by the thousands daily. Many PUP's, when they are detected, are detected as trojans. 

What was the other AV product that you used?

Although it is not recommended to have more than one real time AV product active at a time, there is nothing wrong with having a second opinion on demand scanner installed. Many here use the free version of Malwarebytes as a second opinion scanner.