Download problems

I was prompted to download a new version of comodo after several min of waiting my com told me the download was complete and com needed to reboot.
on reboot i was show a “comodo is not a windows 32 exe file” message with the only option to click “ok”
once i clicked ok my computer booted fine…less comodo, anywhere. not even in my programme files. windows firewall was back on and as usual with my XP i was unable to switch it off until i re-installed the original version of comodo.
what’s that all about then?