AVG PC Tune up GUI

I installed the AVG PC tune up free version to try it out, but unfortunately I have only managed to run it once. I click on the icon, it comes up with the "do you want to allow this to make changes" message. I click 'yes' and then Nothing (no GUI or anything appears on screen.).
I wait a bit (10 minutes) and still nothing. this has happened every time since that one occurrence. Help!

Hi Stuart,

We're glad to look into this and help you.
We suggest you to restart your computer and try installing the AVG PC TuneUp again.
Check if the installation works after the restart.
Keep us posted.

Hi Stuart,

We're glad to look into this and help you.
We suggest you to restart your computer and try installing the AVG PC TuneUp again.
Check if the installation works after the restart.
Keep us posted.