Absolutely agree on the access. This PC has 5 user accounts on it. My laptop which I use for business has only myself, which I run as a standard user and an admin account that I log in to when I want to do admin type things. I don't generally get any problems on this one.
By restricting Domdex as a site within IE I've got rid of the irritating effect where it goes to a Dpomdex blank page whenever you try to access a site in IE.
That is a symptom rather than the problem though, so I will now need to look at the boot methods as above.
I have the windows XP CD so can restore files if necessary.