1.) restart your modem and wifi on your pc
2.) make sure all your drivers are up to date
you can use an app(eg: driver booster 3 which is free) to check if they are
3.) you can disable the device and re-enable
4.) You can also renew you IP address
1. Open windows command prompt Start\ Run\cmd\ok
2. To release your Ip address ipconfig /release
Enter
3. To renew your IP address ipconfig /renew
Enter