Hey Joe,
Thanks for the help. I will check up with Lenovo about the feature, that's quite strange actually because I can't find any physical button on the laptop that can switch the WiFi off.
I've disabled the power management already and so far the problem hasn't reoccurred.
Can you give me a link to the Software/driver I was meant to download and install? I checked on the website but I don't know which one is the proper one.
I will see how it goes and keep you updated if the problem occurs again in the future and send you the diagnostics.
Thanks!