Upgrading from original OS especially if your laptops drivers were discontinued Allir ökumenn sem şú şarft!
that is another page for drivers. If the brightness will not turn up is that hte only problem?
and also can you please send me a print screen of your device manager
Right click My computer>Device Manager>Expand all options>Print screen and post here
As i can actually see if infact anything is missing?
As your only going by a driver fault..