I have avast pro, which updates regularly, and also malwarebytes which I run weekly ( daily when running slow ). A few days ago my lappy started to run very slowly so I ran scans etc as usual but nothing was detected. Yesterday I downloaded and ran ad-aware which detected the trojan ( win32.generic!BT ). I quarantined it and things were much better. Today was slow so ran ad=aware again and up popped the same trojan! The quarantine chest says there are 2 of the same trojan in there. Why would avast miss them? And malwarebytes too? Both are updated regularly and both missed these bugs.
I am confused, 2 trojans or the same one ( incidentally #1 detected on smart scan, #2 on full scan ). How many programmes are needed to keep a computer free of viruses etc?
Any advice would be very welcome.