I ran the Zone Alarm removal tool and restarted my PC.
I haven't been having any issues with the PC whilst running the new Personal Firewall.
I have a feeling that the windows security services you mentioned may have been removed the last time I had an issue with the PC - ie. not during this attack / clean up process. I say this because I now remember that the Windows Firewall was not running before and that the Security Center was not working. I did however think that last time my partner did a reinstall and I just presumed it was added back at that time - but maybe not.
As for your entry above - I installed ERUNT but there was no option to NOT have a folder on the start up folder. Basically it just asked me what I wanted to call the folder - but I had no option as to whether or not I wanted it. As such when I installed ERUNT it does appear on the start menu. As this goes against your instructions in step 1 I did not proceed to run the software (ie. I did 1 and 2 of Step 1 but nothing further).
Should I proceed onto to part 3 of step 1?
Thanks again for your ongoing assistance btw.
Part of me is tempted to stop at this stage since I have a working firewall and anti-virus system. Can I ask - once the Windows Security Centre is workign again will it cause issues with the other software on the PC?