Not a problem (now), but I hope the following saga might save somebody else some bother.

When my Norton Internet Security package told me it was due for renewal, I looked at the price and decided to try something else.

I downloaded the trial version of AVG Anti-Malware. I had read a few comments that AVG might not install if Norton was running, so I switched off as many options in Norton as I could, and then installed AVG, with the idea that if there were any problems with AVG, I still had 30 days of Norton left.

All seemed to go well until the first reboot, and XP hung at the Welcome screen, and did so every time.

I booted into safe mode, and removed AVG - the machine started fine.

I turned Norton back on again, and this time found the Norton Removal tool, that they provide (shame you can't just do it from Control Panel...).

Removed Norton completely, re-installed AVG, and everything is working a treat.

So on my machine at least, Norton had to go completely before AVG would work.

Thanks for posting that , how do you like AVG?

So far so good - easy to set up, and when I used it to fix a different, virus-packed, PC, it did its job OK. And the price is a lot better than Norton's!

lol avg is awesome. i have the free edition installed on my computer, my parents computer, my grandmothers, and my grandfathers computer. works great and best of all, its FREE