Today I booted up & Avast warned me that the above Trojan has been found in Windows>Sys 32> Drivers> mchLnjdrv.sys. Avast offers to rename, delete ignore or put into vault. All options have been tried, but the system picks up the infection upon reboot. I have tried A Squared - but this does not even pick up the Trojan. System Restore has been switched off, but this has had no effect.
We agree to differ - never used a firewall before & see no need to start doing so now.
Anyhow, tried to exclude the path as you suggested, rebooted & the virus was found again [?] Looking at the folder, the listed infected file was not there - so it appears that Avast AVG had somehow go it itself into a loop and was reading files that had already been removed.
I have uninstalled Avast now & gone back to AVG free AVG, which is a competent program and I have used it before.
Thanks for your help - at least it identified another path rather than a full format :o)
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