After fresh windows install wifi not found

HI

After installing fresh copy of w7 on Acer Aspire e5-571, wifi not working.
I tried installing drivers from acer page, but didnt know which one to install... so i intalled all of them. All other features worked fine, bet wifi driver was not instaled and wifi card was not found...

I tried many hours to find answer on web but no luck, so i thought that i need new windows, i instaled windows 8, but problem is not resoved.

Now i run W8 and i have no idea what to search or do,

please help