Please explain these infections BehavesLike.Win32.Malware.klt (mx-v), Trojan.Win32.Generic!BT, rojan-Dropper.Win32.Agent.bjw and Zango[780]

We just downloaded and installed Ad-Aware 9.0.5 Spyware on a computer.  After running Ad-Aware, it found the following attackers:

     1 .BehavesLike.Win32.Malware.klt (mx-v)
     2. Trojan.Win32.Generic!BT
     3. Trojan-Dropper.Win32.Agent.bjw
     4. Zango[780]
     
     (see also actual messages in the code/snippet area within this page)

We also have installed in this PC: Avg antivirus, Malwarebytes' Anti-Malware, Spybot - Search & Destroy, SpywareBlaster, SpywareGuard and SUPERAntiSpyware.

These 7 software are run periodically and 3 of them (AVG, SpywareGuard and Spybot) are in memory always.

We need some explanation of our situation:

   1.  Why the 7 software never identified those four attackers?
   2.  Out of the 4 files infected, SQLassist (sqlassist.exe & sqlassist.dll) is a tool
        for our SQL guy.  How does those two files (sqlassist.exe & sqlassist.dll)
        cause any problem (our SQL uses it everyday)

Thanx in advance

Description: c:\program files\sql assistant\data\sqlassist.dll Family Name: BehavesLike.Win32.Malware.klt (mx-v) Engine: 3 Clean status: Success Item ID: 2 Family ID: 0 MD5: xxx
Description: c:\users\username\documents\tmg-trecorder32.exe Family Name: Trojan.Win32.Generic!BT Engine: 3 Clean status: Success Item ID: 3 Family ID: 0 MD5: xxx
Description: c:\users\username\documents\convertsbatch&scipts-to-execs,exescript.exe Family Name: Trojan-Dropper.Win32.Agent.bjw Engine: 3 Clean status: Success Item ID: 4 Family ID: 0 MD5: xxx
Description: c:\users\username\documents\vlcsetup.exe Family Name: Zango[780] Engine: 1 Clean status: Success Item ID: 0 Family ID: 0 MD5: xxx

Select allOpen in new window