I would leave any registry issues to the programs you already have installed and the ones you plan on installing. In my experience registry repair programs usually cause more harm then they do good.Do you recommend any Registry repair applications or is it better to leave it to the above applications or of course ‘THE EXPERTS at G2G’?
Yes, go to Windows Update now, If it will let you install SP2 go for it. Then install the remaining ones after thatIs it now ok to go to Windows update – should I download XP Pro SP2 before the rest of the updates as no doubt some updates are included in SP2.

Yes, you can delete all of those programs.Can I delete/uninstall the ‘clean up’ programs we used – KillBox, Look2Me etc etc?.
Of courseI assume I can change the settings/install the same applications on my other PC running XP Home SP2?.

I don't believe so. You should be able to add the google toolbar to both browsers, unless there were quite a few modifications to the Yahoo Broadband browser.I have 2 browsers on that machine Internet Explorer and IE modified by BT Yahoo Broadband - will that cause and problems with SpywareBlaster and IESpyad
Can I add the Google toolbar to both browsers?
I’m now left with one query I still have not heard back from BT Yahoo concerning how to download and install their Anti virus/ Firewall so I’ll continue with the two freeware applications – but I still have Norton/ Symantec applications in Add/remove progs which I cant remove, I’ve seen a download file in G2G to remove Norton stuff – or should I just delete everything from Explorer and leave Add/remove as it is
You can try the Norton removal tool, even with it I've still seen some people unable to uninstall it completely.
We can remove the entries in Add/Remove manually with HijackThis.
Delete an Entry from the Uninstall List
- Open HiJackThis
- Click on the "Config..." button on the bottom right
- Click on the tab "Misc Tools"
- Click on the Box that says "Uninstall Manager"
- Click on the Norton entries you wish to delete
- Click on Delete this entry
- Click "Yes"