When launching Substance painter a pop-up window can appear mentioning that your drivers are outdated. This message simply means that we recommend a certain version of drivers for this specific brand of GPU.
Note that some computer may have two GPUs : an integrated one (like an Intel chipset) and a dedicated one (like an Nvidia graphic card). Both needs to be up to date.
In some cases, the latest new drivers may not be available for some GPU models if they are too old. In this case, try to find the latest drivers available for your GPU.