MBA 2014 wont connect to wifi

hi,

my MBA suddenly wont connect to wifi

it has bootcamp with windows 10 and its wifi connection has no problems

im updated to the 2nd latest os x high sierra

i think the latest update was released 5 days ago

cant update to latest os cause cant connect to wifi

ive tried forgeting the network tried connecting

but still says cant connect to network

*typed this in windows bootcamp