In this case our first recommendation is to verify with the computer manufacturer how to turn WiFi and Bluetooth on since usually they provide a hardware switch, key combination, software utility or a combination of those methods.
Once you know the desired wireless capabilities are enabled you may download the software from the following links:
Intel® PROSet/Wireless Software and hardware version compatibility
How to install Intel® PROSet/Wireless Software for Bluetooth® technology
In case the issue persists further information may be needed like the wireless adapter model, if it worked before, and what changed before it failed.
Otherwise, you may get the drivers from the computer manufacturer since those were intended and tested with your system.