Further to all the messing about for the past 4 hours

I now get the "installation is corrupted" error when AVG tries to update.  I get the same error message as mentioned in my other post "AVG FREE DOESN'T WORK".  It still doesn't. The "fix now buton doesn't work either". I have lost confidence in computers and computing (not to mention computer companies who foisted the damned things on us) having used them for the past 35 years.  My information can be stolen quite easily and the software to to prevent this doesn't work.  Windows 10 was a nightmare on my sister's laptop.  Both AVG and W10 are both buggy and unstable and whilst trying to simplify said software for new users it's now more unusable than ever.  I've wasted over 4 hours of time (which I won't get back).  Given the recent TalkTalk (UK ISP) hack, It's simply not good enough.  This forum site is also buggy and unreliable too.

Hello Christopher,
We regret for the inconvenience caused. Could you please let us know the error message while installing the AVG program and a screenshot of the error message can help us to assist you better in analyzing the issue.
Thank you.

Hello Christopher,
We regret for the inconvenience caused. Could you please let us know the error message while installing the AVG program and a screenshot of the error message can help us to assist you better in analyzing the issue.
Thank you.