In device manager, find the id string code for the hardware. Search for drivers based on this id-string, from the hardware manufacturer. The manufacturer of the hardware device may have more current drivers than the computer manufacturer.
Sometimes, a slightly newer model laptop with same hardware id, but bundled with an updated operating system, will have a more recent driver available. For example, with two laptops that were similar, but with different model names, I picked the business version that came with a newer Windows than mine. The laptop manufacturer did have the newer drivers for the newer laptop. The manufacturer never updated their database to include business or ultimate Windos 7.
Laptop motherboards are mass produced and often the same hardware is found in other laptops with new drivers. Cross referencing is very helpful. Microsoft also has a database for hardware and which windows drivers are good or never updated for newer windows. The Microsoft database shows if the driver works or not, and if there is a work around such as vista drivers with compatibility mode in windows 7 or 8. In a pinch I use an external mouse with a wheel.