Hi Ruban,
Please contact HP support for validated driver for your laptop, the notebook vendor has driver version customized for your HP Pavilion 15 laptop model. Here is the download link found at HP site, you may check this out if the graphic driver is the version you need.
Please note the above site was given for your reference, since it is a 3rd party website, we dont' have control over the content.
Hope this help.
Rgds,
wb