First, make sure your computer supports the upgrade to 8.1. Not all do. If it does support it, the the manufacturer has drivers for it. Check for bios update as well...very common. Also, go to Windows Update and install the updates available, especially look at the 'suggested' and 'recommended' updates.
How can I give you a link when you haven't said what laptop you have? Give us the manufacturer and the model.
Intel I7 960 @ 3.87ghz *Intel DX58SO *AMD R9 290 4gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ** Toshiba P75-A7200 * Intel I7-4700MQ * Windows 8.1 64bit
***** cetera fallunt, ludere mortuus ******