Computer is rarely used so I find it improbable it was infected some other time the preceeding month with a trojan seperately from my own trojan infection (it is somewhat sensitive and I don't wish to reveal too much detail but I can, through various means, be certain of such an infection despite AV:s not showing anything).
The avast! boot-up scan after moving these items to quarantine showed nothing, yet when opening Chrome the real-time protection was prompted (see attachment, unfortunately not in English but I'm sure the pertinent information can be understood).
MBAM scan found two infections that were removed (see attachment log).
OTL scans also attached.
My questions are threefold:
1) This is not my own system but my moms, it lacked a firewall so I downloaded Zonealarm. Are there any other steps I should take to ensure protection? How can I know computer is safe despite nothing detected anymore? Nothing was found for a month, despite several scans, how do I know everything was found now? Computer is still behaving somewhat erratic at times, for example freezing for quite some time just typing in this box (happend twice now, somewhat uncharacteristic for a new computer like this one but could be nothing I guess).
2) Can the other computers be considered safe after a reformat? (In other words, is a rootkit of this type removed by a full reformat?)
Very grateful for any advice.
Edited by Patrick1891, 23 July 2012 - 06:27 PM.