Hi,
Couple of things you need to consider when connecting wireless with your laptop.
1. Range - How far from the wireless router
2. Terrain - Where is the router positioned
3. Internet Speed - How fast is my Internet Speed.
If all these are all okay, do uninstall/reinstall the wireless adapter.
- Go to Device Manager and uninstall the wireless adapter
- Reboot the laptop since it will reinstall the uninstalled driver while booting back up
- Test it again.