Could you please navigate to the below location and let us know your network adapter;
Check your driver version using the following steps:
- Click the Windows Orb, right-click Computer, and select Manage.
- If prompted, click Continue.
- Select Device Manager.
- Click on the next to Network Adapters and let us know the brand for the same
Dell Wireless 1450 Dual Band WLAN Mini-PCI Card
Great!! Could you please right click on your Network adapter and click on Update Driver and check if there exists any latest version for the same. Apparently , you can also visit Dell website and check if there is a updated version for that brand of adapters.