Hi,
Here are some troubleshooting steps that may help.
- Start by uninstalling/reinstalling the Wifi adapter.
- Go to Device Manager and uninstall the Wifi adapter.
- Once uninstalled, download and install the latest driver from Fujitsu support site.
- Reboot your laptop once the latest driver has been installed.
- After the reboot do test it again and see if your laptop will now connect to your wireless network normally.