Re: re-installing drivers (video controller VGA compatible)
When you reinstall an OS there is an order in which to reload system software and drivers that is listed HERE
If you did not then this can be a cause of your issues. You may have to reinstall the OS. But before you go that route try loading your Notebook system software in normal mode and the chipset in Safe Mode. These are the two most important drivers. You will all the necessary drivers HERE.
Select your OS and then use your service tag to pare the list down to drivers particular to your particular system