The first thing you may probably want to check is if the wireless adapter is shown/detected in device manager (control panel). If so, try to uninstall it from there but do not check “Delete the driver software for this device” and then restart the computer.
If the wireless adapter is not detected at all in device manager it could mean the switch to enable it is off. Please consult the computer’s documentation or contact the system manufacturer support line for assistance in regards of the wireless radio switch.
In any case if the issue persists you may want to elaborate a little bit more the description of the issue; please provide information such as: Intel® wireless adapter model, software/driver version, the device (AP/router) you are connecting to, and if the wireless adapter is detected.