Most laptops have built-in WiFi device but its function can not receive stable signal. Sometimes, you will find webpage or e-mail exploration very slowly and unstably. Also for the desktop do has the wireless card but can not get the great signa. The following options will resolve your reception problems:
High Power USB adapter with different outdoor and indoor antenna.
A. The signal from your own router
If you are difficult to get the signal from your own router in your house, you can choose below antenna with USB adapter.
Solution 1. Suit for Department 1 floor about 3 bedrooms.
1000mW USB adapter with high gain dipole antenna :