My name is David.
If the laptop was previously able to connect to the wireless network, then the issue may be resolved by performing a system restore which will roll back operating system settings to a previous configuration but will not impact any personal settings, files or programs. To do this
click the Start button then Control Panel then System and then System Protection. Click Yes if a prompt asks you if you would like to proceed. Then click System Restore and click Next. Click a restore point from the list that is dated prior to when the issue first occurred and click Next, then Finish and then Yes. The computer will reboot and perform the System Restore which should restore your computer back to the previous working state.
If that does not resolve the issue please let me know.