yahoo answers recommended using norton antivirus to clear it.
Since you mentioned it was a trojan, I would think that antivirus
is better than antispyware
Blocking popups only solves the symptoms, not the root
I agree with you that it blocks the symptoms.
Qoologic can also be known as adware to some anti viruses like
McAfee.
since no other funny funny occurances (programmes installed )
are seen except pop ups, it's most probably only a Qoologic
hijack case.
blocking it will preventing it from occuring, but it would still
be there, thus a hijack log to analyse should be used.
Do note that: There is a rogue anti spyware programme
named "Trojan Win32/Qoologic" , thus most solutions online are
to remove that rogue anti spyware/anti virus thing.