Ensure you have the right laptop driver below and check you removed the old driver before installing the new one. On my old laptop with a Geforce card it was essential to remove the old driver using Windows add/remove program then restart then install the new driver.If you need to roll back to the old driver you will need to remove the new one by this method and install the old one as using Windows Rollback is not recommended by Nvidia. I always update drivers straight from Nvidia or Ati and have never had any problems.