[Computer problems after Microsoft Agent phone call...malware persists.]

Please close this topic.  No one replied in time before computer had to go back to owner.

[stung by the AMMYY scam]

Please close this topic.  No one replied in time before computer had to be returned to owner.

[Computer problems after Microsoft Agent phone call...malware persists.]

My Windows XP computer will not update Java or install any antivirus program.  I thought I cleaned the AMMYY malware after reviewing what other folks did, but something is still amiss. I could really use some help.  What should I do?

[stung by the AMMYY scam]

I've been unable to recover from the AMMYY scam.  Cannot install any antivirus program.  Cannot install/update Java.  Windows Firewall was missing, but since rebuilt.  Window XP Home edition SP3.  Already ran Malwarebytes, HitmanPro, Spybot, HiJackThis, JRT, Emsisoft, ComboFix.  I could really use some help.  Thanks.