Broni has been assisting me in trying to clean up the PC which I've named GROTTO_2.
Under his guidance, I've been trying many things, but the PC is still infected.
The trouble probably has multiple origins:
On a previous XP PC, "GROTTO":
1. Early in 2013 I'd omitted to do regular virus scans with AVG IS 2013 and when I did,
AVG IS 2013 reported a trojan, which had been on the PC for an unknown period.
2. On 2013-08-03 I was very dumb: I allowed myself to be scammed to the tune of ZAR 3600, by a "snake charmer" ,
who spoke to me for 99 minutes on our landline telephone and I
allowed installation of software of Ammyy Admin for remote "assistance".
By the next day I'd realised that it had been a scam and refused to speak to them again, when they phoned repeatedly.
Since then I've been going from one old XP PC to the next,
each time removing the HDD and installing it in an external USB case.
Of these I now have three 3.5" HDDs and one custom 2.5" external USB drive.
My wife's PC "Bettie_XP2" is also so badly "locked down" by malware, that I cannot even get it started in safe mode.
Now I'm working on XP PC "GROTTO_2"
GROTTO_2 has been donated to me, and I do not have the installation disks.
My wife and I both intend buying new laptops - but we dare not transfer anything from GROTTO_2, before the problems have been cleared up.
I would be most thankful to be helped out of this morass - which is mainly of my own creation.
(I have to leave off now - to resume when I've read the rest of Broni's instructions.)