My pc is connected to the internet but sometimes it wont work

my internet is connected to my pc, sometimes it works like it needs to, most of the time my pc wont use any data for some reason.
for example,
you wanna load a sports website, its loading quick and good to go.
but then after 5 minutes you go to the same website, on the same network but it wont load, you look at the task manager and find out that there is no usage of wifi at all.
you look at the internet access icon, the internet reception is at max and there is no error mark next to it.
i tried to reset my pc, switch internet companies, switch routers, resetting the ipv4....
i tried anything.... my internet (im using wifi for my pc) just wont work.
i used the wifi on other devices including other computers and it worked perfectly.
you might think the problem is with the repeater or with that thing that gets wifi signals for the pc, well it is not.
i used my phone's hotspot on my pc and it worked without any problems.
no matter what i tried, it failed.... hope that one of you guys would help me