I have an acer E5-521 I downloaded the free windows download in July

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In July I downloaded the windows 10, I had windows 8.1 and at first things seemed fine but then a new anniversary version came out and I downloaded that version....I no longer have wifi, I can not sussessfully install any updates but I can get on google and from there into 

facebook....makes no sense....there is a warning explination mark in a yellow triangle on my wifi icon.  when I click on that icon it says I have no internet some days or says it is not connected at all.  I have researched this countless times , seeked out advise from computer repair places who now says it will cost me a huge amount to get it fixed...If anyone could help, I would appreciate it so much...I am a senior citizen and I am pretty computer savy but money is tight...thank you.

Acer-Mary

Sorry this has happened. There have been several reports of issues after the anniversary date that hopefully Microsoft will resolve with future updates. You should be able to roll back to before the update and steps are provided in the links below that you might find helpful:

http://www.thewindowsclub.com/uninstall-windows-10-anniversary-update

 

http://www.howtogeek.com/206271/how-to-roll-back-or-uninstall-a-problematic-windows-update/