AVG TuneUp not doing its job

My computer is working at 39% of its optimum according to AVG TuneUp.  I can't get it to do any better than that.  My subscription has just automatically renewed, so I want to get the latest version.  I did contact AVG themselves and had a very slow online chat with someone who said that they had sent me a link, but they haven't.  How do I go about uninstalling the old copy and installing the latest version?  Make the instructions idiot-proof please as I'm not very computer savvy.

Carolyn,
We understand how difficult this is for you, we apologize. Do not worry, we will do our best to resolve this issue. We request you to uninstall older version of AVG as suggested here: http://avgclick.me/UninstallAVGAV

Kindly download your AVG remover and run it, then go to C: drive -> AVG Remover -> Bin -> pctremover.exe and avgfmwremover.exe (do not restart your device if prompted), then run avgremover.exe (it will automatically reboot your device).

Then please remove AVG folders manually as suggested below. Go to Run window (press windows key and R key simultaneously) and type the following comments to delete the folders.

Carolyn,
We understand how difficult this is for you, we apologize. Do not worry, we will do our best to resolve this issue. We request you to uninstall older version of AVG as suggested here: http://avgclick.me/UninstallAVGAV

Kindly download your AVG remover and run it, then go to C: drive -> AVG Remover -> Bin -> pctremover.exe and avgfmwremover.exe (do not restart your device if prompted), then run avgremover.exe (it will automatically reboot your device).

Then please remove AVG folders manually as suggested below. Go to Run window (press windows key and R key simultaneously) and type the following comments to delete the folders.

Hi
Thanks for your help.  I'm not very tech savvy at all.  However I asked my son's advice and he has helped me and seems to have sorted it out.  Many thanks for your help.
Carolyn

  1. Type  “Temp” and press enter, remove all the files.
    2.  “%temp%” and remove all the files.
    3.  %appdata% - Remove all the AVG folders.
    4.  %programdata% - Open the AVG folder and remove the old files.

    Please go to c: drive-> program files and delete the AVG files and download your AVG program from our official site: http://www.avg.com/us-en/download.

    Please, feel free to let us know if you require any further assistance. Thank you.

Carolyn,
Pleased to see that you appear to be sorted now. Thanks for returning to the Community & posting. We appreciate all your efforts and patience. Please feel free to get back to us for any issues with AVG. We work round the clock, thank you!