Shoutbox

In PM she told me that she has threatfire installed, but can't remove it as she isn't meant to be an administrator on the PC, but can get around it.

You have a few options:

1) Uninstall ThreatFire and install a suitable replacement like AVG or Avast and hope that your Mum doesn't noticed
2) Ask your Mum if you can uninstall ThreatFire and replace it with something else as it stops Messenger Plus! Live working
3) Miss out on using Messenger Plus! Live

Personally I'd go with option 2.  It's not unreasonable to ask that, as ThreatFire isn't unique in what it does and we can direct you to like-for-like replacements.....plus it doesn't go behind your Mum's back, it shows that she can trust you