my laptop needed a different solution. here goes:
it seems that i accidentally lost the laptop's drivers to wireless internet (i guess my siblingsr had deleted the wrong files) so i just went to my computer's official page and downloaded the 2 driver that were responsible for internet and wifi.
i run their setups and after the restart everything went back to normal.
to check if there is indeed a drivers problem, u can go to driver manager.
then click "network adapters"
undereath that, should be 2 or more devices that are related to your internet.
if they have a grey line around them, you do not need to download drivers, just press "enable".
if there are yellow triangles with a question mark near them, or sth like that, then you have a drivers problem.
download driver from your laptop's company official site (such as Acer) and run their setups. if that doesnt work, rerun the setups, and click "repair" this time.
hope this has been helpful